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World Urbanization

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Urbanization

AN INTRODUCTION TO URBAN GEOGRAPHY

Third Edition

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Urbanization

AN INTRODUCTION TO URBAN GEOGRAPHY

Third Edition

Paul L. Knox

University Distinguished Professor and

Senior Fellow for International Advancement College of Architecture & Urban Studies, Virginia Tech

Linda McCarthy

Associate Professor, Department of Geography

University of Wisconsin–Milwaukee

Geography Editor: Christian Botting

Marketing Manager: Maureen McLaughlin

Project Editor: Anton Yakovlev

Assistant Editor: Kristen Sanchez

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Front Cover Photo Credit: Photo of Shinjuku neighborhood, Tokyo. © 2011 PhotoLibrary.com

Rear Cover Photo Credit: Dancing in Harajuku neighborhood, Tokyo. © Alamy.

Credits and acknowledgments borrowed from other sources and reproduced, with permission, in this textbook appear on the appropriate page beginning on p. 441.

Copyright © 2012, 2005, 1994 Pearson Education, Inc. All rights reserved. Manufactured in the United States of America. This publication is protected by Copyright, and permission should be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. To obtain permission(s) to use material from this work, please submit a written request to Pearson Education, Inc., Permissions Department, 1900 E. Lake Ave., Glenview, IL 60025. For information regarding permissions, call (847) 486-2635.

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Library of Congress Cataloging-in-Publication Data

Knox, Paul L.

Urbanization : an introduction to urban geography / Paul L. Knox, Linda McCarthy. —3rd ed. p. cm.

Includes bibliographical references and index. ISBN 978-0-321-73643-7

1.Urban geography.2.Urbanization.I. McCarthy, Linda (Linda Mary)II. Title. GF125.K56 2012 307.76—dc22

2011030227

12345678910—EB—1514131211

ISBN 10: 0-321-73643-5 www.pearsonhighered.comISBN 13: 978-0-321-73643-7

Preface xi

About the Authors xiii

Part 1 Introduction 1

Chapter 1 URBANIZATION AND URBAN GEOGRAPHY 3

Learning Outcomes 3

Chapter Preview 3

The Study of Urban Geography 4

◼ Urban View 1.1: The Art of Taking Back a Neighborhood: The Heidelberg Project 4

Space, Territoriality, Distance, and Place 5

Approaches to Urban Geography 6

◼ Urban View 1.2: Census Definitions 8

Urbanization: Processes and Outcomes 9

Economic Change 9

Demographic Change 11

◼ Urban View 1.3: Globalization and Cities 12

Political Change 12

Cultural Change 13

Technological Change 13

Environmental Change 14

Social Change 14

The Plan of the Book 14

FOLLOW UP: Key Terms 15 • Review Activities 15

Part 2 Foundations and History of Urbanization 17

Chapter 2 THE ORIGINS AND GROWTH OF CITIES AND URBAN LIFE 19

Learning Outcomes 19

Chapter Preview 19

The Definition of a City 20

◼ Urban View 2.1: Bernal Diaz Del Castillo’s Description of Tenochtitlán in 1519 20

Preconditions for Urbanization 22

Theories of Urban Origins 22

Agricultural Surplus 22

Hydrological Factors 22

Population Pressures 22

Trading Requirements 22

Defense Needs 23

Religious Causes 23

A More Comprehensive Explanation 23

Urban Origins 23

Mesopotamia 23

Egypt 24

The Indus Valley 24

Northern China 24

The Andes and Mesoamerica 24

Internal Structure of the Earliest Cities 25

◼ Urban View 2.2: Internal Structure of the Earliest Cities 25

Urban Expansion from the Regions of Urban Origin 27

◼ Urban View 2.3: The Silk Road: Long-Distance Trade and Urban Expansion 28

The Roots of European Urban Expansion 29

Greek Cities 29

Roman Cities 30

Dark Ages 31

Urban Revival in Europe during the Medieval Period 33

◼ Urban View 2.4: Hanseatic League Cities 38

Urban Expansion and Consolidation during the Renaissance and Baroque Periods 39

Urbanization and the Industrial Revolution 40

◼ Urban View 2.5: Manchester: Shock City of European Industrialization 41

◼ Urban View 2.6: Residential Segregation in Mid-Nineteenth Century Glasgow, Scotland 44

FOLLOW UP: Key Terms 44 • Review Activities 44

Chapter 3 FOUNDATIONS: THE U.S. URBAN SYSTEM AND ITS CITIES 47

Learning Outcomes 47

Chapter Preview 47

◼ Urban View 3.1: Frontier Urbanization and Some Problems of Daily Life 48

Frontier Urbanization 48

The Mercantile Period (1790–1840) 50

◼ Urban View 3.2: Vance’s Mercantile Model 51

Inside the Mercantile City 51

THE PEDESTRIAN CITY 53

MODELS OF THE MERCANTILE CITY 53

Early Industrial Expansion and Regional Realignment (1840–1875) 53

Some Principles of Urban Growth 55

Interpreting and Analyzing the Urban Hierarchy and the Central Place System 55

THE RANK-SIZE RULE 55

CENTRAL PLACE THEORY 57

BEYOND CONSUMER HINTERLANDS 58

Inside the Early Industrial City 58

Urbanization and the Public Interest 58

◼ Urban View 3.3: Immigrant Housing Conditions 59

Instruments of Change: Horsecars and Railroads 60

HORSECARS 60

RAILROADS 61

The Organization of Industry (1875–1920) 62

The Industrial City 62

ECONOMIC SPECIALIZATION AND THE REORGANIZATION OF URBAN SPACE 63

FRAMING THE CITY: NETWORKED INFRASTRUCTURES 65

THE EMERGENCE OF LAND USE ZONING LAWS 66

THE SUBURBAN EXPLOSION: STREETCAR SUBURBS 67

RAPID TRANSIT 68

MASS TRANSPORT AND REAL ESTATE DEVELOPMENT 69

Inside the Industrial City 69

CENTRAL BUSINESS DISTRICTS 70

DEPARTMENT STORES AND SHOPPING DISTRICTS 70

DOWNTOWN OFFICE DISTRICTS 70

WAREHOUSE ZONES 71

CITY HALLS AND CIVIC PRIDE 71

THE SPATIAL ORGANIZATION OF CBDS 71

LAND VALUES AND URBAN LAND USE 72

SECTORS AND ZONES 73

FILTERING AND VACANCY CHAINS 74

Fordism, the Automobile, Suburban Infill, and the Great Depression (1920–1945) 74

A Critical Turn for Urbanization: The Depression and Macroeconomic Management 75

The Rise of Suburbia 76

Fordism 76

Paving the Way for Suburbanization 77

PARKWAYS 77

THE DECLINE OF MASS TRANSIT 78

Patterns of Suburban Growth 78

AUTOMOBILE SUBURBS 78

PLANNED SUBURBS 79

SUBURBANIZATION AND FEDERAL POLICY 82

SUBURBANIZATION OF COMMERCE AND INDUSTRY 83

NEW PATTERNS OF LAND USE 83

FOLLOW UP: Key Terms 84 • Review Activities 84

Chapter 4 URBAN SYSTEMS AND CITIES IN TRANSITION 87

Learning Outcomes 87

Chapter Preview 87

◼ Urban View 4.1: Fast Food and Religion in the Exhaust of a Drive-in Culture 88

Regional Decentralization and Metropolitan Sprawl (1945–1973) 88

Metropolitan Sprawl 90

The Fordist Suburb 91

Suburban Production and Consumption Spaces 95

Central City Land Use 95

Demographic and Social Change in Cities 96

◼ Urban View 4.2: The Canadian Urban System 97

THE BABY BOOMERS AND URBAN CULTURE 98

AGING POPULATIONS 98

THE BURDEN OF YOUTH 98

THE NEW IMMIGRANTS 98

◼ Urban View 4.3: Boomerang Generation: Y Us? 99

Economic crisis, Restructuring, and New Metropolitan Form (1973–Present) 99

Economic Crisis and Urban Distress (1973–1983) 99

◼ Urban View 4.4: Contemporary European Urbanization 100

Economic Restructuring and New Metropolitan Form (1983–Present) 102

◼ Urban View 4.5: Australian Cities 103

World Cities 104

Globalization and Urban Change 106

◼ Urban View 4.6: Japanese Cities: Tokyo and the Tokaido Megapolitan Region 107

The Polycentric Metropolis 107

The End of “Suburbia” 110

◼ Urban View 4.7: From Boomburbs to Bustburbs? 111

FOLLOW UP: Key Terms 112 • Review Activities 113

Part 3 Urbanization and the Less Developed Countries 115

Chapter 5 URBANIZATION IN THE LESS DEVELOPED COUNTRIES 117

Learning Outcomes 117

Chapter Preview 117

◼ Urban View 5.1: The Dream of a Better Life as a Garment Girl in Dhaka 118

Urbanization Trends and Projections: The Less Developed Countries in Global Context 118 Factors Promoting Urban Growth 122

◼ Urban View 5.2: Fleeing the Countryside for Life in the City in Africa 123

Theories of Urbanization and Economic Development 123

Modernization Theories: The Developmental Approach 123

Urban Bias and Underdevelopment 125

◼ Urban View 5.3: A Model of Peripheral Urbanization 127

New Models from the Less Developed Countries: Opportunities for Development 127

A Historical Perspective on Colonial Urbanization 127

Indigenous Urbanization at the Eve of the European Encounters 127

Colonial Urbanization 129

Mercantile Colonialism 132

Industrial Colonialism 132

Late Colonialism 133

Early Independence 133

Neocolonialism and the New International Division of Labor 134

Globalization and Neoliberalism 135

Overurbanization 135

Overurbanization and Megacities 135

Widespread Overurbanization 135

◼ Urban View 5.4: The Harsh Realities of Life in a Megacity 136

FOLLOW UP: Key Terms 137 • Review Activities 137

Chapter 6 URBAN FORM AND LAND

USE IN THE LESS DEVELOPED COUNTRIES

139

Learning Outcomes 139

Chapter Preview 139

◼ Urban View 6.1: Life in a Haiti Tent City 141

Patterns of Urban form and Land Use 141

Latin American Cities 141

African Cities 145

Islamic Cities 148

◼ Urban View 6.2: Fighting Racial Discrimination in South African Cities with Soccer? 149

◼ Urban View 6.3: Towering Ambition in Persian Gulf Cities and the Global Economic Downturn 153

South Asian Cities 154

◼ Urban View 6.4: A Day in the Life of a Call Center Worker in India 156

Southeast Asian Cities 157

◼ Urban View 6.5: Shanghai, a World City and ”Dragon Head” of China’s Economy 159

East Asian Cities 159

◼ Urban View 6.6: Foreign Direct Investment and Regional Development in the Pearl River Delta, the World’s Largest Extended Metropolitan Region 163

FOLLOW UP: Key Terms 165 • Review Activities 165

Chapter 7 URBAN PROBLEMS

AND RESPONSES IN THE LESS DEVELOPED COUNTRIES 167

Learning Outcomes 167

Chapter Preview 167

◼ Urban View 7.1: Narrowing the Digital Divide in Africa: Skipping Landlines for Cell Phones 168

Urban Problems 169

Poverty 169

◼ Urban View 7.2: Defying Gender Stereotypes: Las Cholitas in Bolivia 172

Inadequate Housing 172

Lack of Urban Services 174

◼ Urban View 7.3: A Terrible Human Toll: HIV/AIDS in SubSaharan African Cities 176

Transportation Problems 177

◼ Urban View 7.4: How Rationing Can Backfire: The “Day Without a Car” Regulation in Mexico City 178

Environmental Degradation 179

Responses to the Problems of Urbanization 180

Sustainable Urban Development 180

The “Globalization Paradox” and Recent Changes in Urban Governance 181

◼ Urban View 7.5: Urban Social Movements and the Role of Women: Mahila Milan in Mumbai, India 183

FOLLOW UP: Key Terms 184 • Review Activities 184

Part 4 Processes of Urban Change 187

Chapter 8 THE URBAN DEVELOPMENT PROCESS 189

Learning Outcomes 189

Chapter Preview 189

◼ Urban View 8.1: Two Sides of the Housing Crisis: Skateboarding and Foreclosure 190

Property, Location, Rent, and Investment 190

◼ Urban View 8.2: Global Financial Meltdown, Local Disinvestment 192

Patterns of Investment in Land and Property 194

Property as a Financial Asset 194

The Structures of Building Provision 194

City Makers 194

LANDOWNERS 195

SPECULATORS 196

DEVELOPERS 196

BUILDERS 198

CONSUMERS 199

REALTORS, FINANCIERS, OTHER PROFESSIONAL FACILITATORS 199

GOVERNMENT AGENCIES 199

Market Responses of the Development Industry 200

◼ Urban View 8.3: Urban Development is Less and Less a Local Activity 200

NEW PRODUCTS 201

FOLLOW UP: Key Terms 204 • Review Activities 204

Chapter 9 HOW NEIGHBORHOODS CHANGE 207

Learning Outcomes 207

Chapter Preview 207

◼ Urban View 9.1: Staying Put Despite the Spiral of Neighborhood Decline: A Mad Hatter? 208

Neighborhood Change 209

Redevelopment and Reinvestment 209

◼ Urban View 9.2: The Household Life Cycle 210

Neighborhood Life Cycles 211

Housing Markets 211

Urbanization and the Tenure Transformation 212

◼ Urban View 9.3: Cabrini-Green: A Cherished Home in a Place That was a Symbol of Everything Wrong with Public Housing 214

Public Housing 214

◼ Urban View 9.4: Public and Private Housing in European Cities 217

Residential Mobility and Neighborhood Change 218

Movers, Stayers, and Neighborhood Change 218

The Impact of New Arrivals to the City 219

Intraurban Moves 219

◼ Urban View 9.5: Neighborhood Stability in West European Cities 219

Reasons for Moving 220

Understanding Household Behavior: The Decision to Move 221

Understanding Household Behavior: The Search for Alternative Places to Live 222

Housing Market Gatekeepers, Bias, and Discrimination 223

Real Estate Agents as Social Gatekeepers 223

Mortgage Finance Managers as Social Gatekeepers 225

Insurance Agents as Social Gatekeepers 226

◼ Urban View 9.6: Hoxton’s Serial Transformations 227

Putting it all Together: The Example of Gentrification 228

FOLLOW UP: Key Terms 231 • Review Activities 231

Chapter 10 THE POLITICS OF CHANGE: URBANIZATION AND URBAN GOVERNANCE

233

Learning Outcomes 233

Chapter Preview 233

◼ Urban View 10.1: The Disneyfication of Times Square 234

The History of Urban Governance 235 Laissez-faire and Economic Liberalism (1790–1840) 235

Municipal Socialism and the Rise of Machine Politics (1840–1875) 236

Boosterism and the Politics of Reform (1875–1920) 237

THE PROGRESSIVE ERA 237

ANNEXATION 238

Egalitarian Liberalism and Metropolitan Fragmentation (1920–1945) 239

THE NEW DEAL 241

Cities as Growth Machines and Service Providers (1945–1973) 241

BLACK POWER AND BLACK POLITICS 243

◼ Urban View 10.2: Milwaukee Demolishes the “Freeway to Nowhere” 243

THE STRUGGLE FOR SOCIAL JUSTICE AND SPATIAL EQUITY 244

Entrepreneurial Politics and Neoliberalism (1973–Present) 245

◼ Urban View 10.3: Tax Increment Financing (TIF) 246

Fiscal Crisis 247

◼ Urban View 10.4: The Fiscal Squeeze and U.S. Central Cities 248

Fiscal Retrenchment and Neoliberalism 249

The Privatized City 250

PRIVATOPIA 251

NIMBYism, Smart Growth, and the Geopolitics of Suburbia 251

ZONING STRUGGLES 252

“SMART” GROWTH 252

Civic Entrepreneurialism and the Politics of Image 253

STRATEGIES FOR URBAN ECONOMIC DEVELOPMENT 254

THE POLITICS OF PACKAGING 256

Perspectives on Governance, Politics, and Urban Change 257

The Structure of Local Power 257

The Role of the Local State 259

Patterns of Local Conflict 259

FOLLOW UP: Key Terms 260 • Review Activities 260

Chapter 11 URBAN POLICY

AND PLANNING 263

Learning Outcomes 263

Chapter Preview 263

The Roots of Urban Policy and Planning 264

◼ Urban View 11.1: Competition at all Costs: Civic Entrepreneurialism Taken Too Far? 264

Themes and Perspectives 265

The Beginning: Philanthropy and Reform 265

Early European Traditions 266

EBENEZER HOWARD AND GARDEN CITIES 266

PATRICK GEDDES AND SCIENTIFIC PLANNING 267

United States: Jacob Riis and the Tenement Commissions 269

Progressive Era Reforms 269

SETTLEMENT HOUSES 270

THE PARK MOVEMENT 271

THE CITY BEAUTIFUL MOVEMENT 272

The City Practical 273

The New Deal 273

Policy and Planning for Renewal and Growth (1945–1973) 274

Europe: Planning For Renewal 274

◼ Urban View 11.2: The Visible Legacy of Urban Policy and Planning in European Cities 276

The United States: Planning for Growth 277

The Courts and Urban Policy in the United States 277

SCHOOL DESEGREGATION 277

RESTRICTIVE COVENANTS 277

CIVIL RIGHTS 278

Federal Policy Initiatives 278

Evangelical Bureaucrats 279

Neoliberal Policy and Planning 280

THE PROPERTY RIGHTS MOVEMENT 280

Planning as Dealmaking 280

◼ Urban View 11.3: Kelo v. City of New London Eminent Domain Lawsuit 281

◼ Urban View 11.4: Urban Regeneration in London’s Docklands 281

MIXED-USE DEVELOPMENTS AND CLUSTER ZONING 283

◼ Urban View 11.5: Competitive Regionalism 283

Planning for Healthy and Livable Cities 284

Sustainability and Green Urbanism 284

◼ Urban View 11.6: Cities Take Environmental Sustainability Efforts into Their Own Hands 285

◼ Urban View 11.7: Sustainable Metropolitan Planning Efforts in the United States 286

Metropolitan Governance and Planning 286

FOLLOW UP: Key Terms 288 • Review Activities 288

Part 5 People and Places 289

Chapter 12 THE RESIDENTIAL KALEIDOSCOPE 291

Learning Outcomes 291

Chapter Preview 291

◼ Urban View 12.1: The French Ghetto Beat of a Muslim Rapper 293

Social Interaction and Residential Segregation 293

Territoriality 294

The Foundations of Residential Segregation 295

Social Status 295

Household Type 297

◼ Urban View 12.2: The Social Construction of Race 297

Ethnicity 298

Lifestyle 301

◼ Urban View 12.3: Social Exclusion and Migrant Workers in European Cities 303

Interpretations of Residential Ecology 304

The Chicago School: Human Ecology 304

CRITICISMS OF HUMAN ECOLOGY 306

FACTORIAL ECOLOGY 306

◼ Urban View 12.4: Residential and Economic Structure in European Cities 307

Recent Changes to the Foundations of Residential Segregation 307

New Divisions of Labor, New Household Types, and New Lifestyles 309

NEW ROLES FOR WOMEN 310

◼ Urban View 12.5: The Ethnoburb—A New Suburban Ethnic Settlement 311

NEW PATTERNS OF HOUSEHOLD FORMATION 312

INCREASED MATERIALISM AND NEW LIFESTYLES 313

◼ Urban View 12.6: “Inconspicuous Consumption?” 315

Social Polarization and Spatial Segregation 316

The New Residential Mosaic: “Lifestyle” Communities 318

◼ Urban View 12.7: GIS Marketing Applications Help Starbucks to Brew up Better Locational Analyses 319

FOLLOW UP: Key Terms 321 • Review Activities 321

Chapter 13 THE CITY AS TEXT: ARCHITECTURE AND URBAN DESIGN 323

Learning Outcomes 323

Chapter Preview 323

◼ Urban View 13.1: Disney’s Celebration: Designing the Happiest Place on Earth? 324

Architecture and the Dynamics of Urban Change 325

Architecture and Exchange Value 325

Architecture and the Circulation of Capital 325

Architecture and Legitimation 326

MEANING AND SYMBOLISM 326

Architecture versus “Mere Building” 326

The Style of Production/The Production of Style 326

Arcadian Classicism and the “Middle Landscape” 327

PUBLIC PARKS 328

Beaux Arts and the City Beautiful 328

The American Way: Skyscrapers 329

Modernism: Architecture as Social Redemption 330

ARTS AND CRAFTS AND ART NOUVEAU 331

THE EARLY MODERNISTS 331

THE BAUHAUS AND THE MODERN MOVEMENT 332

LE CORBUSIER 333

AN AMERICAN RESPONSE 335

THE CRITIQUE OF MODERNISM 336

The Postmodern Interlude 338

NEW URBANISM 339

HISTORIC PRESERVATION 340

Design for Dystopia 341

FORTRESS L.A. 341

“Starchitects,” “Starchitecture,” and World Cities 342

FOLLOW UP: Key Terms 345 • Review Activities 345

Chapter 14 URBANIZATION, URBAN LIFE,

AND URBAN SPACES 347

Learning Outcomes 347

Chapter Preview 347

◼ Urban View 14.1: The Writing on the Wall for Territoriality? Taggers Respect Community Mural Painted in “Neutral” Colors 348

Social Life in Cities 348

Theoretical Interpretations of Urban Life 349

The “Moral Order” of City Life 349

◼ Urban View 14.2: “Sex and the City”: Prostitution 350

ANOMIE AND DEVIANT BEHAVIOR 351

LIBERATING ASPECTS OF URBAN LIFE 352

Urbanism as a Way of Life 352

The Public and Private Worlds of City Life 353

Changing Metropolitan Form and New Forms of Urbanism 354

URBAN VILLAGES 354

◼ Urban View 14.3: Homosexuality and the City 355

SUBURBAN COMMUNALITY, “HABITUS,” AND CONTEMPORARY LIFESTYLES 357

Community and Territory 358

COGNITION, PERCEPTION, AND MENTAL MAPS OF THE CITY 358

APPRAISIVE IMAGES 360

Lifeworlds and the “Structuration” of Social Life 361

◼ Urban View 14.4: Disability and the City 362

Time-Space Routines 363

◼ Urban View 14.5: Structuration: Time and Space in People’s Everyday Life 364

Gendered Spaces 365

The Creation of Women’s Spaces 365 Changing Roles, Changing Spaces 367

Discrimination by Design: Domestic Architecture and Gender Differences 369

FOLLOW UP: Key Terms 369 • Review Activities 369

Chapter 15 PROBLEMS OF URBANIZATION 371

Learning Outcomes 371

Chapter Preview 371

◼ Urban View 15.1: Homeless Students Struggle to Keep Up 372 Problem? What Problem? 372

From Haunts of Vice to Gang Wastelands—and Back 373

Problems of the Early Industrial City 373

Problems of the Industrial City 374

Problems of the Post-War City (1945–73) 376

Problems of the Neoliberal City 376

Poverty 377

The Cycle of Poverty 378

◼ Urban View 15.2: Poverty, Stress, and Civil Disorder in U.S. Cities 380

POVERTY IN U.S. METROPOLITAN AREAS 381

DUAL CITIES? 382

Criminal Violence 385

◼ Urban View 15.3: High School Student Drug Abuse 387

Spatial Patterns 387

◼ Urban View 15.4: Russian Mafia Crime and Corruption—Not Just in Russian Cities Anymore 389

The Effects of Crime on Urbanization and Urban Life 389

◼ Urban View 15.5: Terrorism and Cities 391

Homelessness 392

The Causes of Homelessness 394

Infrastructure and Environmental Problems 397 Water Supply Problems 398

◼ Urban View 15.6: Brownfield Redevelopment 400

Air Pollution 400

◼ Urban View 15.7: High-Speed Rail in Europe 402

Infrastructure Crisis 402

◼ Urban View 15.8: London’s Traffic Congestion Charge 406

Persistent Future Problems 407

FOLLOW UP: Key Terms 409 • Review Activities 409

Notes 411 Glossary 427

Credits 441 Index 446

PREFACE

Towns and cities are in constant flux. They are hives of human activity and crucibles of social, cultural, and political change, where there is always something happening. At times, people and circumstances accelerate the restlessness of urban change, with the result that the function, form, and appearance of cities are transformed. Such was the case over a hundred years ago, when a combination of economic, social, and technological changes were turning cities in Europe and the United States inside out and upside down, forging, in the process, the physical, economic, and political framework for the evolution of the “modern” city.

We are currently living through another phase of transformation, this time involving global processes of economic, cultural, and political change. Within the cities of countries like the United States, the classic mosaic of central city neighborhoods has become blurred as cleavages among people based on income, race, and family status have been fragmented by new lifestyle and cultural preferences. The long-standing distinction between central cities and suburbs has become less and less straightforward as economic reorganization has brought about a selective recentralization of some commercial and residential land uses in tandem with a selective decentralization of much commerce and industry. Outlying centers big enough to be called “edge cities” and “boomburbs” have appeared, as if from nowhere.

Meanwhile, cities in less developed countries have grown at unprecedented rates, with distinctive processes of urbanization creating new patterns of land use and posing new sets of problems for urban residents. A pressing problem today for the people in many less developed countries is a process of overurbanization in which cities are growing more rapidly than the jobs and housing that they can sustain. There has been a “quartering” of cities into spatially partitioned, compartmentalized residential enclaves. Luxury homes and apartment complexes correspond with an often dynamic formal sector of the economy that offers well-paid jobs and opportunities for some people; these contrast sharply with the slums and squatter settlements of people working in the informal sector—in jobs not regulated by the state—who are disadvantaged by a lack of formal education and training and the often rigid divisions of labor shaped by gender, race, and ethnicity.

URBAN GEOGRAPHY

Urban geography allows us to address these trends, to relate them to our own individual lives and concerns, and to speculate on how they play a role in other fields of study such as economics, history, sociology, and planning. The study of urban geography can help us better understand the marketplace and appreciate the interdependencies involved in local, national, and international economic development. It can provide us with an appreciation of history and the relationships among art, economics, and society. It can illuminate the

interplay of science and technology with economic and social change, reveal important dimensions of race and gender, raise important issues of social inequality, and point to important lessons for governance and policy. Most of all, of course, it can help us to understand, analyze, and interpret the landscapes, economies, and communities of cities and metropolitan areas around the world.

NEW TO THE THIRD EDITION

The third edition of Urbanization: An Introduction to Urban Geography represents a thorough revision based on a number of substantive changes.

• This edition has been shortened considerably, from 18 to 15 chapters. The organization of the book has been fundamentally reworked to improve the structure and flow of the material. The 15 chapters in this new edition are arranged into different sections where they fit seamlessly together: Section I, Introduction; Section II, Foundations and History of Urbanization; Section III, Urbanization in the Less Developed Countries; Section IV, Processes of Urban Change; and Section V, People and Places.

• The content of some chapters has been substantially reorganized. Chapters 3 and 5 from the previous edition (The Foundations of the American Urban System; The Foundations of Urban Form and Land Use) are now combined into one chapter on the processes and outcomes in the evolution of the U.S. urban system up to 1945. Chapters 4 and 6 from the previous edition (Urban Systems in Transition; Changing Metropolitan Form) are also now combined to cover the urban processes and outcomes since 1945 in the United States, Canada, Europe, Australia, and Japan. Chapter 18, “Urban Futures,” from the previous edition has been removed and instead partly incorporated into other chapters.

• There is new material, with more non-U.S. examples, about important urban issues such as the global financial meltdown and its impact on urban residents, including discussion of foreclosures and homeless students, as well as the aftermath for the people in cities hit by the massive earthquakes in Haiti and Japan.

• There are many new “Urban View” essays that capture not only the vitality, experiences, and achievements of ordinary people in cities, but also address the problems that they struggle to overcome every day. This edition includes 29 new essays.

• New or expanded chapter topics include globalization, neoliberalism, overurbanization and megacities, “starchitecture” and world cities, the U.S. Hope VI and the Choice Neighborhood programs, gentrification, gender discrimination, environmental problems including brownfields and greyfields, sustainable urban development, smart growth, and green urbanism.

• Also new to this edition are Learning Outcomes at the beginning of each chapter, which list key knowledge that students should have acquired after reading the chapter.

• The content of end-of-chapter Follow Up Activities (with new subsections titled “Key Terms” and “Review Activities”) has been completely revised for each chapter to reflect the updated material in the book.

• The third edition of the book also incorporates a comprehensive updating of all the data, as well as many of the maps, photographs, and illustrations, in addition to the glossary.

• A second color has been added throughout the text, enhancing the readability and the pedagogical value of the maps and other art.

• Finally, the new premium website for Urbanization: An Introduction to Urban Geography , found at www.mygeoscienceplace.com, now includes self-study quizzes, MapMaster layered thematic and place name interactive maps, Urban View Google Earth ™ tours, key resources and suggested further readings, related helpful websites, “In the News” RSS feeds, and additional references and resources.

OBJECTIVES AND APPROACH

In this book we attempt to capture the changes in the nature and outcomes of urbanization processes for people, as well as the development of new ways of thinking about urban geography. A dynamic approach to the study of urban geography is the most distinctive feature of the book: unraveling the interlocking processes of urbanization to present a vivid and meaningful explanation of constantly changing urban geographies and urban life. An important advantage of such an approach is that it provides a framework capable of capturing recent changes while addressing much of the “traditional” subject matter of urban geography. The dynamic approach also allows for the integration of theory with fact. In this book, key concepts and theories are presented in relation to prior events and ideas.

In this way, we can appreciate the logic of particular theories and their relevance to particular circumstances. In writing this book, we have aimed at providing a coherent and comprehensive introduction to urban geography that offers a historical and process-oriented approach with a U.S. focus that also provides a global context and comparative international perspectives.

ACKNOWLEDGMENTS

We are grateful to many individuals for their help in forming and testing our ideas. Our gratitude is wide and deep, and we take this opportunity to acknowledge the contributions of Brian Berry, University of Texas at Dallas; Martin Cadwallader, University of Wisconsin, Madison; Bill Clark, University of California, Los Angeles; Ron Johnston, University of Bristol; Peter Taylor, Loughborough University; Anne Bonds and Judith Kenny at the University of Wisconsin-Milwaukee, and at the University of Minnesota, Helga Leitner, and Roger Miller who is missed terribly.

We would like to acknowledge the content and accuracy reviewers and the contributors of content to this edition: Kevin Archer, University of South Florida; Piper Gaubatz, University of Massachusetts; Dennis Grammenos, Northeastern Illinois University; Donald Lyons, University of North Texas; Nina Martin, University of North Carolina; Sara Metcalf, State University of New York: Buffalo; Lawrence F. Mitchell, Northern Kentucky University; Murray Rice, University of North Texas; Derek Shanahan, Millersville University.

We have also been fortunate in being able to call on the talents and energies of Jonathan Burkham in searching for material, and Jenna Gray at PreMediaGlobal and Ed Thomas at Pearson in preparing the book for publication. Caroline Commins has meticulously researched the photographs for the book. Anton Yakovlev at Pearson provided a constant source of advice, enthusiasm, encouragement, and support.

ABOUT THE AUTHORS

Paul Knox received his PhD in Geography from the University of Sheffield, England. After teaching in the United Kingdom for several years, he moved to the United States to take a position as professor of urban affairs and planning at Virginia Tech. His teaching centers on urban and regional development, with an emphasis on comparative study. He serves on the editorial board of several scientific journals and is the author or co-author of numerous books, including Small Town Sustainability (Birkhauser), Metroburbia USA (Rutgers University Press), Cities and Design (Routledge), and The Geography of the World Economy (Hodder) as well as Pearson’s Human Geography and World Regions in Global Context: Places and Regions in Global Context . In 2008 he received the Distinguished Scholarship Award from the Association of American Geographers. He is currently a University Distinguished Professor at Virginia Tech, where he also serves as Senior Fellow for International Advancement.

Linda McCarthy received her PhD in Geography from the University of Minnesota, USA, and her BA from University College, Dublin. She is an Associate Professor in the Depart ment of Geography and the Urban Studies Program at the University of WisconsinMilwaukee. She is also a certified planner. Her teaching centers on cities and globalization. Her research focuses on urban and regional economic development and planning in the United States, Europe, and China. Her recent academic journal articles have been on regional cooperation instead of wasteful competition for corporate investment; government subsidies for automobile plants; environmental justice and brownfield redevelopment; and the globalization of the economy. Linda is the co-author of another book, The Geography of the World Economy (Hodder), with Paul Knox and John Agnew.

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Urbanization and Urban Geography 1

This book introduces urban geography by focusing on the processes and outcomes of urbanization that are so important for the people who live in cities. Cities are products of many forces. They are engines of economic development and centers of cultural innovation, social transformation, and political change. At the same time, urban areas vary in everything from employment opportunities for job seekers to patterns of land use in neighborhoods, racial composition in metropolitan regions, and social behavior in urban society. Given the considerable range of issues that urban geography encompasses, we need to try to develop a consistency in our approach. Understanding theories about cities and the way they change—rather than simply listing their various attributes—will help to ensure that we maintain a consistency and will give us greater insight into the way cities work. Although we will sometimes need to look closely at specific people and events, our goal is to focus on understanding how to read the economic, social, and political “blueprints” that give shape and character to various kinds of cities and urban life. By “generalizing” in this way, we will have a more immediate and richer understanding of each new aspect of urbanization that we encounter.

LEARNING OUTCOMES

After reading this chapter, you should be able to:

■ Assess how and why the concepts of space, territoriality, distance, and place influence everyone in cities.

■ Describe why several approaches to urban geography have arisen, and how it is possible to gain urban insights from each.

■ Explain how urban geographies result from long-term changes involving the interrelated dynamics of economic, demographic, political, cultural, technological, environmental, and social change.

■ Compare and contrast the broad phases in the nature of capitalism and their importance for cities in the United States since the 1700s.

■ Understand the ways in which the rapidly increasing interdependence of the world-system has impacted cities and the people living in them.

CHAPTER PREVIEW

The fundamental task of the student of urban geography is to make sense of the ways that towns and cities have changed and are changing, with particular reference to the differences both between urban places and within them. As a student, you will understandably find yourself asking some fundamental questions. What exactly is urban geography, and how does it relate to other aspects of geography and to other social science subjects? What is involved in urbanization, and what outcomes of urbanization that affect people are important in studying urban geography? This first chapter answers those questions and introduces some of the organizing principles and concepts that recur throughout the book.

First, we address the question of urban geography as a subject for academic study, emphasizing the importance of concepts of space, territoriality, distance, and place that influence everyone in cities. We then review the various approaches that have been taken to the study of cities from a geographical perspective. We will see that

Cities are hives of human activity and crucibles of social, cultural, and political change, where there is always something happening. Urban geography can help us to understand, analyze, and interpret urban landscapes such as in this photograph of Woodruff Park and the people enjoying a wonderful view of the downtown skyline of Atlanta, Georgia.

they are all encompassed by the overall framework for study that is adopted in this book: a framework that allows us to deal with various aspects of urban geography in terms of their relationship to urbanization as a process.

The second half of the chapter addresses this question of urbanization as a process. Here we see how urban geographies and urban change associated with every aspect of people’s lives are the result (and sometimes the cause) of long-term changes in economic development and in the interrelated dynamics of technological, demographic, political, social, cultural, and environmental change. Because these changes are being framed increasingly at the global scale, our framework for studying urban geography also views urbanization from a global perspective involving people and cities from all over the world. Finally, we look ahead to the contents and organization of the rest of the book.

URBAN VIEW 1.1

THE STUDY OF URBAN GEOGRAPHY

Like other aspects of human geography, urban geography is concerned with “local variability within a general context.”1 This means that it is concerned with understanding both the distinctiveness of individual places (at the scale of towns and cities or particular neighborhoods) and the regularities within and between urban areas in terms of the spatial relationships between people and their environment (see Urban View 1.1 entitled “The Art of Taking Back a Neighborhood: The Heidelberg Project”). We should immediately note that environment here includes not only the natural physical environment but also the built environment (everything from homes, factories, offices, and schools to roads and bridges), the economic environment (economic institutions, the structure

The Art of Taking Back a Neighborhood: The Heidelberg Project2

Multicolored polka dots decorating one house, a boat filled with stuffed toy animals nearby, and a vacant lot with rows of car hoods painted with faces (Figure 1.1). The Dotty Wotty House, Noah’s Ark, and Faces in the Hood are just some of the guerrilla art installations on Heidelberg Street in Detroit by Tyree Guyton, a trained artist, whose philosophy is:

I believe that my job as an artist is to help people to see! I wanted to use my talents to bring about positive change in my community . . . I use art as a catalyst for social change. I chose to start right here in my own neighborhood and yet I realized that the first change had to start with me. Changing my mind and seeing with my eye of understanding helped to eradicate my fears and limitations. Social change must start with self and then you can change the entire world around you.

And you cannot help notice the change immediately as you arrive at Heidelberg Street, having passed city block after city block with as many vacant lots as houses, uncut grass and invading weeds, and trash littering the crumbling sidewalks. For the urban geographer, this is an unforgettable example of “local variability within a general context.” The distinctiveness of the Heidelberg Project reflects the kind of local variability that is possible in a particular city despite the general context of urban decline due to regularly repeated stories of deindustrialization, suburbanization, and poverty in Rustbelt cities like Detroit.

What started with decorating Tyree Guyton’s grandfather’s house with polka dots 25 years ago has become the nonprofit Heidelberg Project, which attracts 275,000 visitors of all ages each year. But it has not only changed former crack houses and abandoned homes into art that explodes with bright paint and discarded items, it has also helped keep the street free of trash and crime, create a strong sense of community, and provide educational opportunities for neighborhood children to experience the transformative potential of art.

The Heidelberg Project’s social importance was recognized with a 2004 Places Award by the Environmental Design Research Association (EDRA):

Clearly this work is not only about what you see. It’s about the dialogue it engenders . . . The Heidelberg Project offers

an alternative vision to young children in one of America’s most blighted urban areas; it broadens community awareness of the power of art; and it brings a new sense of important social realities to the consciousness of visitors.

FIGURE 1.1 An abandoned house is covered with discarded toy stuffed animals to become art as part of the Heidelberg Project in Detroit that has also helped to keep this street free of trash and crime, create a strong sense of community, and provide educational opportunities for neighborhood children to experience the transformative potential of art.

and organization of economic life, and so on), and the social environment (including norms of behavior, social attitudes, and cultural and political values that shape interpersonal relations among people).

For urban geographers some of the most important questions therefore include the following: What attributes make cities and neighborhoods distinctive? How did these distinctive identities evolve? Are there significant regularities in the spatial arrangement of towns and cities across a country or region of the world? Are there significant regularities in the spatial organization of land use within cities and in the spatial patterns of people in neighborhoods by social status, household type, or race? The urban geographer will also need to know about the causes of any regularities that do exist. How, for example, do people choose where to live and what are the constraints on their choices? How do people’s areas of residence affect their behavior? What groups, if any, can manipulate the spatial organization of towns and cities? And who profits from such manipulation?

In posing these questions, urban geographers have learned that the answers are ultimately to be found in the wider context of economic, social, and political life. Cities must be viewed as part of the economies and societies that maintain them. The study of cities cannot be undertaken in isolation from the study of history, economic development, sociocultural change, or the increasing interdependence of places within the world economy. A proper understanding of cities requires an interdisciplinary approach. The traditional focus of geography—the interrelationships between people and their physical and social environments—requires geographers to draw on the work of researchers in those related disciplines. Accordingly, the chapters you are about to read will be peppered with references to the work of economists, sociologists, political scientists, historians, city planners, and even artists.

Space, Territoriality, Distance, and Place

Urban geography is a coherent and distinctive framework of study through the central themes of space, territoriality, distance, and place. For the geographer, space is not simply

a medium in which economic, social, political, and historical processes are expressed. It is also a factor that influences patterns of urban development and the nature of the relationships between different social groups within cities. From this perspective, cities are simultaneously the products and the shapers of economic, social, and political change. Partitioning space through the establishment of legal boundaries is also important because it affects the dynamics of cities in several ways. For example, the establishment of municipal boundaries restricts a city’s capacity to raise revenue to its own territory, while electoral boundaries affect where people vote and the outcome of local elections and politics.

Territoriality is the tendency for particular groups within society—ethnic groups, gangs, gated communities—to attempt to establish some form of control, dominance, or exclusivity within a localized area. Group territoriality depends primarily on the logic of using space as a focus and symbol of group membership and identity as a means of regulating social interaction. It is important for the geographer because it is often the basis for individual and group behavior that creates distinctive spatial settings within cities. These spatial settings in turn mold the attitudes and behavior of the people living in cities.

Distance is important for several reasons. It affects the behavior of both producers and consumers of all goods and services. It influences patterns of social interaction and the shape and extent of social networks. Variations in people’s physical accessibility to opportunities and to amenities such as jobs, schools, stores, parks, and hospitals are important in determining the local quality of life.

Finally, place is important because of the geographer’s traditional and fundamental concern with areal differentiation and the distinctiveness of regions and localities. The distinctiveness of particular metropolitan regions, cities, districts, and neighborhoods is central to the analytical heart of urban geography: mapping variability, identifying regularities in spatial patterns, and establishing the linkages that constitute functional regions and subareas. In addition, the sense of place (Figure 1.2) that people associate with certain

FIGURE 1.2 A wall mural. A distinctive mural in a Hispanic neighborhood in Milwaukee, WI, near Cesar Chavez Drive and across from the Sixteenth Street Community Health Center that provides health care, health education, and social services to low-income residents in the neighborhood. Community art such as this provides a remarkably clear expression of the sense of place and territoriality that are fundamental to the spatial organization of people in cities.

cities and localities is important, because it can influence their decisions: where to live, where to locate an office or a factory, whether to hire someone from a particular place, or whether to walk alone through a certain part of town, for example.

Approaches to Urban Geography

Urban geography has evolved to encompass a variety of approaches to its subject matter. This is the result of a more general intellectual evolution of ideas in the social sciences. For example, a widespread “quantitative revolution” has occurred both in urban geography and in the social sciences as a whole. Two developments spurred this revolution. Large quantities of reliable socioeconomic data about cities and city neighborhoods became available from sources such as the censuses of population and housing in many countries. At the same time, tools to analyze and shape this information were becoming widely available in the wake of new digital technologies and geographic information systems (GIS). Modern analytical and modeling techniques have made a decisive contribution to the social sciences. They have allowed the urban geographer to see farther, with more clarity, and have provided the means by which to judge theories about urbanization.

Like other fields, urban geography has also been influenced by changing social values. As each society’s comprehension of urban problems has grown, attitudes toward research in urban geography have become more flexible. Much of the research undertaken today in urban geography has relevance far beyond the ivory towers of academia and involves a more active engagement with the needs and concerns of local communities, private companies, and government. Urban geographers are likely to be consulted on issues that range, for example, from optimal political redistricting (redrawing the boundaries of local voting districts) to the evaluation of government policies aimed at enhancing local economic development in distressed central city neighborhoods.

Finally, changes in cities themselves and in the nature of urbanization have also contributed to the evolution of approaches to urban geography. As we have become aware of changes in cities and have looked more closely at those changes, new topics for study have emerged. A good example is the increased interest that geographers have taken in community well-being after the cuts to many public services in richer countries like the United States that have hit some poorer and older people very hard over the past couple of decades. An equally striking, more recent example is the interest by geographers in the link between local housing markets and international finance after the financial meltdown of 2008–09 and the personal misfortunes of families losing their homes due to foreclosure.

The details of the evolution of urban geography as an academic subject are beyond the scope of this book. It is important, however, to establish a few central points about that evolution. Several decades ago, work in urban geography (or “settlement geography,” as it was more commonly known) saw towns and cities as adaptations to natural physical circumstances. Attributes of urban settlements were interpreted as responses to local sites, regional resources, and the opportunities and constraints surrounding them. So, for example, the growth of Pittsburgh as a steel town can be interpreted spatially, from this perspective, in terms of the availability of local sources of coal, iron ore, limestone, and water, along with proximity to large markets for iron and steel products that benefited local businesspeople and workers.

Another body of work within this spatial description approach that dominated the early development of the subject was focused on the “morphology” of towns and cities—their physical form, their plan, and their various townscapes and “functional areas” (that is, districts with a distinctive mixture of interrelated land uses). Keeping with the example of Pittsburgh,

1.3 An urban geographer looking at this neighborhood of young families with children would want to discover what it has in common with similar neighborhoods in other cities and what makes it distinctive from them.

FIGURE

these studies would likely have emphasized the influence of the city’s hilly topography on the layout of its streets and neighborhoods, and perhaps shown how urban growth and land use were “fixed” by the limited amounts of flat land (along the Monongahela River) that the captains of industry at the time saw as suitable for large ironworks.

Gradually, scientific principles influenced attitudes toward knowledge, and both settlement and morphology studies fell out of favor. In their place there emerged a spatial analysis approach based on the philosophy and methodology of positivism that had been developed in the natural sciences. This philosophy was founded on the principle of verification of facts and relationships through accepted scientific methods. The rise of positivism affected all of geography and most of the social sciences, and the “quantitative revolution” reinforced it. Its practitioners came to redefine urban geography as the science of urban spatial organization and spatial relationships, and, as a science, it focused on the construction of testable models and hypotheses. One example of the many possible positivistic approaches to aspects of Pittsburgh’s urban geography would be an attempt to quantify the relationship between neighborhood social status and proximity to steel mills. The hypothesis might be that neighborhood social status tends to increase steadily with distance from a steel mill. If this were demonstrated with verifiable evidence, the next step might be to begin to develop a theory by replicating the study in other industrial cities.

This more abstract approach has contributed a great deal to our understanding of cities, and it continues to be a mainstay of urban studies. But sometimes its abstractions and overdependence on statistical data can seem flat and lifeless in the face of the urban realities of people’s lives to which they are applied. The abstractions tend to leave unanswered many of the important questions concerning underlying processes and meanings. So, although it might be useful to be able to use census tract data to establish and quantify a tendency for neighborhood social status to increase with distance from an industrial plant, we are left without any sense of how the relationship came about: Who made what decisions, and why, in the process of establishing the relationship? How might any exceptions to the overall relationship be explained?

In response to such questions, a behavioral approach emerged. This approach focuses on the study of individual people’s activities and decision making in urban environments. Although the behavioral approach continued to use a positivist methodology, explanatory concepts and analytical techniques were also derived from social psychology and some key ideas came from social philosophy, with its insights into human needs and impulses.

The behavioral approach’s relative neglect of the importance of cultural context for understanding people’s actions and the meanings attached to those actions led to the emergence of the humanistic approach. The behavioral approach’s positivist methodology was replaced by methods, such as ethnography and participant observation, that attempted to answer questions that capture people’s subjective experiences. For Pittsburgh, what kind of meaning does the presence of a steel mill carry for different individuals within the city? How do

people’s feelings about steelworkers’ neighborhoods affect their decisions about where to live in Pittsburgh? Like the behavioral approach, though, the humanistic approach has been criticized for not paying enough attention to the constraints on people’s decision making and behavior.

As a result, another approach, generally referred to as the structuralist approach , gained momentum within urban geography. This approach is cast, in contrast to the behavioral and humanistic approaches, at the scale of macroeconomic, macrosocial, and macropolitical changes. It focuses on the implications of such changes for urbanization and on the opportunities and constraints they present for the behavior and decision making of different groups of people. At its broadest level, this approach draws on a combination of macroeconomic theory, social theory, and the theories and concepts of political science, and includes the political economy approach. For example, a political economy approach to Pittsburgh’s urban geography would certainly want to relate the patterns of growth and decline of both steel mills and their associated blue-collar neighborhoods to the broader structure of, among other things, access to capital by businesses for investment in industry, the availability of skilled labor, the framework of government policies affecting industrial and residential development, and deindustrialization associated with corporate restructuring within the global economy.

The structuralist analyses of the structure of social inequality paved the way for explicitly incorporating the experience of women into urban geography. The feminist approach deals with the inequalities between men and women, and the way in which unequal gender relations are reflected in the spatial structure of cities. For Pittsburgh, the feminist approach might be interested in examining changing gender roles as the urban labor force has restructured following the closing of the steel mills, such as the trend for some women in two-earner households to be overrepresented in certain fast-growing part-time occupations.

The structure-agency approach was an attempt to unite the structuralist approach’s concern with macrolevel social, economic, and political structures with the humanistic approach’s emphasis on human agency. Structuration theory sees society’s social structures as created and recreated by the social practices of human agents, whose actions are themselves constrained by these social structures. As a result, it is impossible to predict the exact outcome of the interactions between social structure and human agency. Despite the elegance of this theorization, empirical investigation has proved difficult because it is not easy to analyze the continuous and complex interrelationships between structure and agency. A study of Pittsburgh might involve questions about how the gentrification of some central city neighborhoods is the result of an intricate set of interactions between human agents, including landowners, mortgage lenders, planners, and realtors; institutions such as the city government; and social structures involving planning regulations such as land use zoning and building codes.

Finally, the influence of literary theory has led to the emergence of poststructuralist approaches, including the postmodern approach. The postmodern approach strongly opposes

the idea that any general theories can explain cities and the people who live in them. Instead, it accepts the shifting and unstable nature of the world and concentrates on questions of who defines meaning, how this meaning is defined, and to what end. It is concerned with understanding the power of symbolism, images, and representation as expressed in language, communication, and the urban landscape. Again, using the example of Pittsburgh, a postmodern approach would likely examine the city government’s attempts to “reinvent” the city within the global economy as it restructures away from steel and toward jobs in the high-tech and services industries. This approach would draw attention to the city government’s use of language and communication to deliberately construct certain images of

URBAN VIEW 1.2

Census Definitions

Just what is meant by an “urban” settlement varies a good deal from one country to another. For the Bureau of the Census in the United States, the term urban applies to the territory, people, and housing units located within urbanized areas and urban clusters.3

• An urbanized area (UA) is a densely settled area (whether or not the territory is legally incorporated as a city) with at least 50,000 people and a density of at least 1,000 people per square mile at the urban core and at least 500 people per square mile in the surrounding territory.

• An urban cluster (UC) consists of an urban core with a population density of at least 1,000 people per square mile and at least 500 people per square mile in the surrounding territory that together encompass a population of at least 2,500 people, but fewer than 50,000 people.

Because such definitions of urbanized depend on administrative boundaries, they do not capture the concentrations of people that live in a number of contiguous jurisdictions that form one continuous metropolitan sprawl. The U.S. Bureau of the Census began to use standardized definitions of metropolitan areas in the 1950 census under the designation of standard metropolitan area (SMA). The term was changed to standard metropolitan statistical area (SMSA) by the 1960 census and to metropolitan statistical area (MSA) in 1983.

Within urban areas, detailed census information is available by census tracts, block groups, and census blocks:

• Census tracts. These geographical subareas have boundaries that were drawn with the objective of delineating small populations that are relatively uniform in terms of their demographic and socioeconomic characteristics. They vary a good deal in territorial extent and population size, although tracts within metropolitan areas contain between 1,000 and 8,000 people. As metropolitan America has grown, so has the number of census tracts recognized by the Census Bureau. The boundaries of many longerestablished census tracts have remained the same over several decades, making it possible to use census data to analyze neighborhood change in certain areas. Elsewhere, however, modifications to tract boundaries and the addition of new tracts make intercensal comparison difficult.

• Block groups. Every census tract is divided into as many as 9 block groups, each of which contains an average of

the city (that may not reflect reality) that, in turn, are designed to influence the views and decisions of potential investors and residents.

For the most part, all these approaches can be regarded as potentially complementary. Although it is neither possible nor desirable to merge them into some kind of all-encompassing model or theory of urbanization, it is possible to gain insights from each. To that extent, all these approaches are represented in this book (with classic examples pointed out). This does not mean, however, that the reader will be faced with sudden or unexpected shifts. The material in this book is organized to emphasize urban geography as the outcome of urbanization as a process.

10 census blocks. A block group consists of all blocks whose numbers begin with the same digit in a census tract. Block groups generally contain between 300 and 3,000 people. Block groups are important because they are the smallest geographical area for which detailed data are tabulated.

• Census blocks. Census blocks generally correspond to the physical configuration of city blocks and are bounded by streets or other prominent physical features. They are the smallest statistical unit for which census data are available, although the range of data is not detailed, being limited to basic population and housing characteristics.

In preparing the 1990 census, the U.S. Bureau of the Census developed an electronic database called the Topologically Integrated Geographic Encoding and Referencing (TIGER) system. TIGER files contain address ranges, latitude and longitude coordinates, and the location of roads, railways, rivers, and other physical features. They can be linked with small-area census data to form the basis of sophisticated Geographic Information System (GIS) applications that offer a great deal of potential for research in urban geography. GIS—organized collections of computer hardware, software, and geographic data that are designed to capture, store, update, manipulate, and map geographically referenced information—has grown rapidly to become an important method of urban geographic analysis. GIS technology allows an enormous range of urban problems to be analyzed. For instance, it can be used to identify the most efficient evacuation routes for people from all or part of a city in the event of a terrorist attack, to monitor the spread of infectious diseases within and between cities, to analyze the impact of proposed changes in the boundaries of legislative districts, to identify potential customers in the vicinity of a new business, and to provide a basis for urban and regional planning.

The changing realities of urbanization present a continual challenge to the census in delineating geographic units that reflect actual patterns of urban and metropolitan change. So census tabulations include data not only for MSAs but also metropolitan areas (MAs), for primary metropolitan statistical areas (PMSAs), consolidated metropolitan statistical areas (CMSAs) and core based statistical areas (CBSAs), each designed to provide a standardized framework for comparisons and analysis at different spatial scales.

URBANIZATION: PROCESSES AND OUTCOMES

Figure 1.4 provides a useful outline of urbanization as a process. It is clear from the diagram that urbanization involves much more than a mere increase in the number of people living and working in cities and metropolitan regions. It is driven by a series of interrelated processes of change—economic, demographic, political, cultural, technological, environmental, and social. It is also modified by locally and historically contingent factors such as topography and natural resources or an “accident” of birth that resulted in Henry Ford being born in Dearborn, Michigan, that ultimately resulted in the Ford Motor Company being headquartered in Detroit and not somewhere else in the United States. It is true that the overall result of urbanization has been a tendency for more and more people to live and work in ever-larger cities and metropolitan regions (although, as we will see, this is not a necessary condition of urbanization). At the same time, urbanization results in some important changes in the character and dynamics of the urban system (the complete set of urban areas regionally, nationally, or even internationally), and within cities and metropolitan regions, it causes changes in patterns of land use, in social ecology (the social and demographic composition of neighborhoods), in the built environment, and in the nature of urbanism (the forms of social interaction and ways of life that develop in urban settings). Certain groups of people might view some of these outcomes as problems. Government policies, legal changes, city planning, and urban management might eventually address those problems, often resulting in changes (sometimes unanticipated) that in turn affect the dynamics that drive the overall urbanization process.

As suggested by Figure 1.4, the relationships among these processes are complex. Urbanization is not only influenced by the direct effects of these dynamics, but it also experiences “feedback” effects. Meanwhile, almost every aspect of urban

PROCESSES

ECONOMIC CHANGE

DEMOGRAPHIC CHANGE

POLITICAL CHANGE

CULTURAL CHANGE

SOCIAL CHANGE

TECHNOLOGICAL CHANGE

ENVIRONMENTAL CHANGE

LOCALLY & HISTORICALLY CONTINGENT FACTORS

URBANIZATION

change is itself to some extent interdependent with some of the others. This complexity can be confusing! We will eliminate much potential confusion with concepts and examples introduced in this chapter. Bear in mind, though, that Figure 1.4 presents a very broad framework that covers the entire subject matter of urban geography. The farther you get into the book, therefore, the more meaningful Figure 1.4 will become. The economic, demographic, political, cultural, social, technological, and environmental processes and relationships implied in the diagram will be elaborated, and the urban outcomes that affect people will be detailed. It is recommended, therefore, that you refer to Figure 1.4 from time to time, putting each new set of material into overall perspective.

Economic Change

At the heart of the dynamics that drive and shape urbanization are economic changes. The sequence and rhythm of economic change will be a recurring theme as we trace and retrace the imprint of urbanization. It is the evolution of capitalism itself that has structured this imprint that affects everyone living in cities. Figure 1.5 summarizes the main features of this evolution. In the United States, there have been several broad phases in the nature of capitalism, and we are now in the early stages of a significantly different phase, framed in the context of globalization.

The earliest phase, lasting from the late eighteenth century until the end of the nineteenth, was a phase of competitive capitalism, the heyday of free enterprise and laissez-faire economic development, with the political economy of the country characterized by classical liberalism: competition between small family businesses and with few constraints or controls imposed by governments or public authorities. In the earlier years of this phase, the dynamism of the entire system rested on the profitability of agriculture and, increasingly, manufacture and

OUTCOMES

URBAN SYSTEMS

LAND USE

BUILT ENVIRONMENT AND TOWNSCAPE

SOCIAL ECOLOGY

URBANISM

SOCIALLYDEFINED PROBLEMS POLITICAL CONFLICT POLICY RESPONSES; PLANNING

Major phases of capitalism

Technology systems

CompetitiveManaged (Keynesianism)

OrganizedAdvanced

Water power

Steam engines

Cotton textiles

Iron works

Infrastructure development

Urban governance and politics

Role of central government Urban systems

Metropolitan form

Canal building First railway boom

Laissez-faire Economic Liberalism

Negligible (liberalism)

Mercantile urban systems (regional)

Coal-powered steam engine

Steel

Railways

Machine tools

World shipping

Internal combustion engine

Oil and plastics

Electrical engineering

Aerospace

Radio

Telecommunications

boom

Municipal Socialism and Machine Politics

Boosterism and the Politics of Reform

automobile boom

Cities as Growth Machines

Increasing: regulator

Strong (direct): manager/regulator

Organization of industry (national frameworks)

Globalized

Microelectronics

Digital

telecommunications

Biotechnology

Informatics

and airports Broadband and satellite systems

Metropolitan Fragmentation and Progrowth Coalitions

Strong (indirect): partner/facilitator

Re-modernization of Institutions, Entrepreneurialism, Neoliberalism

Decreasing: broker (neoliberalism) (egalitarian liberalism)

Pedestrian City Transitional City Industrial City Cities of sectors and zones

“machinofacture” (industrial production that was based less on handicraft and direct labor power than on mechanization, automation, and intensively used skilled labor).

After the Civil War, the extensive railroad system and a strengthened federal system helped to create an economy that was truly national in scale. The most successful family businesses grew bigger and began to take over their competitors. Business became more organized as corporations set out to serve regional or national consumer markets rather than local ones. Labor markets became more organized as wage norms spread, and government began to be more organized as the need for regulation in public affairs became increasingly apparent. By the turn of the twentieth century, these trends had reached the point where the nature of capitalist enterprise had changed significantly. It could now be characterized as organized capitalism—a label that came to be increasingly appropriate with the evolution of the economy over the next 75 years or so. In the early decades of the twentieth century, the system’s dynamism (that is, the basis of profitability) shifted away from industrial manufacture and machinofacture as a new labor process took hold. This process was Fordism, named

Metropolitan spatial decentralization

Suburban infill

Metropolises of central cities surrounded by urban realms

World Cities and international networks

Megapolitan regions

change and urban development in

after Henry Ford, the car manufacturer who was a pioneer of the principle of mass production, based on assembly line techniques and “scientific” management (known as Taylorism), together with mass consumption, based on higher wages for workers and sophisticated advertising techniques targeted at consumers.

The success of Fordism was associated with the development of a rather tense but nevertheless workable relationship between business interests and the labor unions, whose new strength was in itself another important element of “organization.” Meanwhile, the role of government had also expanded—partly to regulate the unwanted side effects of free-enterprise capitalism and partly to mediate the relationship between organized business and organized labor. After the Great Depression of 1929–1934, government’s role expanded dramatically to include responsibility for full employment, the management of the national economy, and the organization of various dimensions of the social well-being of people. The market failures that had triggered the Depression undermined the legitimacy of classical, laissez-faire liberalism and led to its eclipse by an egalitarian liberalism that relied on government to manage economic development and soften the unwanted

FIGURE 1.5 The long-term view. A summary of some of the major features of economic
the United States.

side effects of free-market capitalism for those people most adversely impacted. This top-down approach to economic management, with a commitment to low unemployment, is often referred to as Keynesianism, after the British economist John Maynard Keynes.

After World War II, another important transformation in the nature of capitalist economies became evident. Developed countries like the United States and Canada experienced a shift away from industrial production and toward services, particularly sophisticated business and financial services, as the basis for profitability. It is denoted in Figure 1.5 as an evolution from organized capitalism to advanced capitalism. This shift began to transform occupational structures for workers, sparking deindustrialization—a decline in manufacturing jobs but not in manufacturing production.

Broadly speaking, the key dynamic of urbanization during the two centuries spanning the 1770s and the 1970s was interurban competition for jobs and investment, with the unwanted side effects of uneven development being cushioned increasingly by local, regional, and national government intervention. This long evolution of the capitalist economy saw the emergence of institutions that mutually confirmed and supported one another in an overall process of modernization: the nationstate, the Fordist company, the nuclear family, the system of industrial relations, the welfare state, and the formal institutions of science and technology.

But from the mid-1970s on, cities in the United States, along with others around the world, were caught up in a very different dynamic. The increasing globalization of the economy allowed huge transnational corporations to outmaneuver the national scope of both governments and labor unions by moving routine production and assembly operations to lower-cost, less developed parts of the world as part of a new international division of labor (NIDL). This contributed to a profound destabilization of the relationship between business, labor, and government in developed countries like the United States. Meanwhile, Fordism began to be a victim of its own success, with mass markets for many products becoming saturated. As it became increasingly difficult to extract profits from mass production and mass consumption, many enterprises sought profitability through serving specialized market niches. Instead of standardization in production, specialization required variability and, above all, flexible production systems. There was a rapid decline of the old base of manufacturing industries and the onset of a “new economy” based on digital technologies and featuring advanced business services, cultural products industries, and knowledge-based industries, all framed within the context of a new international division of labor and international finance. The internationalization of economic geography weakened the leverage of both big government and big labor, destabilizing the organized capitalism of the midtwentieth century and allowing a fundamental intensification of the economic and spatial logic of capital—especially big capital. Much of this was directly at odds with the top-down managed capitalism and planned modernization of the previous two centuries, tipping the U.S. space-economy into a significant new phase dominated by neoliberalism: a selective return to the freemarket ideas of classical liberalism. The Reagan administration

of the 1980s dismantled much of the Keynesian welfare state, deregulated industry, ushered in an era of public-private cooperation in place-making and economic development, and rekindled libertarian ideas about the primacy of private property rights. Urban planning has morphed into public-private cooperation, while state and local governments increasingly behave like businesses in their attempts to attract economic development and balance the books. In attempts to recapture some control over the global scale of the new economic logic and its social, cultural, and environmental implications, national governments have become increasingly collaborative, supranational entities have emerged, many institutions have extended their focus from a national to an international frame of reference, and many local and regional organizations have become involved in cross-border collaborative networks of one sort or another.

For some observers, this points to nothing less than the onset of a second major phase of modernization in which the structures and institutions of nineteenth- and twentiethcentury modernization are both deconstructed and reconstructed (Figure 1.5). Whereas urban development during the first modernity was framed by competitiveness within closed geographic systems (national states) that were competing with one another, urban development at the onset of this second modernity is subject to competitiveness at the global scale.

The significance of this historical evolution for urbanization, urban geography, and cities and the people living in them is fundamental. Each new phase of capitalism saw changes in what was produced, how it was produced, and where it was produced. These changes called for new kinds of cities, while existing cities had to be modified. At the same time, of course, cities themselves played important roles in the transformation of capitalist enterprise. As centers of innovation, cities and towns have traditionally functioned as engines of economic growth that provide opportunities for new forms of livelihood and improved prosperity. But despite producing the bulk of national wealth, cities are also locations of exploitation and unemployment. Within a global economy in particular, the costs and benefits of globalization are unevenly distributed among the people that live in cities. The challenge for cities in the global economy of the twenty-first century is to function not only as engines of economic growth but also as agents of change for greater social justice and urban sustainability.

Demographic Change

One of the most important subsets of interdependence suggested in Figure 1.4 is that between demographic change and urbanization. Cities are, in a fundamental way, the product of their people. Put another way, the size, composition, and rate of change of urban populations significantly shape the character of urbanization. Yet the condition of cities themselves can in turn influence those characteristics. Crowded and degraded slums, for example, can lead to higher death rates; cities with good amenities tend to attract particularly large numbers of migrants; and border towns and big cities with international ports and airports tend to attract a disproportionate share of

URBAN VIEW 1.3

Globalization and Cities

The urbanization processes that produce the urban outcomes shown in Figure 1.4 operate at different spatial scales. The rapidly increasing interdependence of the world-system means that the economic and social well-being of cities and the people living in them depends increasingly on complex interactions that are framed at a global scale. Globalization has had profound effects on cities and systems of cities because of the close interaction between global and local forces—a process that has been called glocalization or the global-local nexus. The process and its outcomes involve uneven development both within and among cities. Globalization has led, for example, to the emergence of so-called world cities—command centers such as New York, London, and Tokyo that are key players in the new concentrated financial system.

Although globalization is a complicated and controversial topic, we can identify a number of interrelated dimensions— economic, cultural, and political—associated with its processes and urban outcomes. Economic globalization reflects the fact that, although urban, regional, and national circumstances remain very important, what happens in any given city and how it affects, for example, workers or shoppers, is broadly determined by its role in systems of production, trade, and consumption that have become global in scope. The term globalization is usually associated with the growing importance of transnational corporations operating across a number of countries. The activities of these companies, in the spheres of both production and marketing, are increasingly integrated at a global scale in a new international division of labor. Products are made by workers in multiple locations from components manufactured by workers in other places to take advantage of the full range of geographical variations in costs. With a global assembly system, labor-intensive work can be done where labor is cheap, raw materials can be processed near their source of supply, and final assembly can be done close to major urban markets.

Cultural globalization is associated with the development of a broader global culture. This is a controversial idea, but it essentially involves the widespread diffusion of Western values of materialism. Globalization can be seen in the popularity of Hollywood films or the spread of the hamburger. Indeed, Ritzer4 coined the term “McDonaldization” to denote the ways in which processes of mass consumption are eroding cultural differences

immigrants. Meanwhile, urban economic well-being often mediates the relationships between demographic change and urbanization. So, for example, both birth rates and migration rates depend a great deal on people’s perceptions and expectations of economic opportunities.

Political Change

The broad ideological swings and shifts that occur from time to time are an important aspect of the influence of political change on urbanization. One well-known example is the reform movement that emerged in the United States in the 1870s and 1880s in response to a variety of social problems. As we will see in

among people around the world. It is argued that globalization involves the homogenization of culture—the development of cultural interrelatedness of people throughout the world. New telecommunications systems—especially within urban areas— that allow rapid transmission of information and images to people’s homes and electronic devices have facilitated this process. But there has been resistance by some people to these global forces through the assertion of local cultural identities, including various popular social movements seeking greater autonomy at the level of regions and cities.

Political globalization has been associated with the reduced power of national governments to shape their own destinies. In large measure this has been bound up with the globalization of financial markets so that money can now flow rapidly across national boundaries. In addition, because transnational corporations can switch investment from one country to another, public bodies, including city governments, have little choice but to adopt incentive strategies to compete in attracting and keeping internationally mobile companies and their investment in an effort to promote jobs and economic prosperity for workers and residents.

Altogether, these various dimensions of globalization present an enormous challenge to the effectiveness and appropriateness of the economic, political, social, and cultural structures and institutions that had evolved over the two centuries beginning with the Industrial Revolution in the late 1700s. Globalization has brought hybridity and cosmopolitanism to the national cultures and social systems of people in many parts of the world. As a result, many social and cultural structures and norms have been subject to change or obsolescence, while new, transnational, social and cultural phenomena have emerged. Similarly, globalization has intensified transnational economic and political interdependence, prompting the reform of many economic and political institutions and the emergence of new supranational institutions and networks. For many observers, it all amounts to the onset of a second modernity, a distinctive break from the national frameworks of urban and economic development to a globalizing framework with an entirely new set of possibilities and competitive opportunities; and, of course, the attendant conflicts and contradictions of a new world order.

Chapter 10, the reform movement had an important and lasting influence on urban affairs. A very different and more recent example is that of the political shift at the national and international level before the beginning of the “War on Terrorism”: the end of the Cold War, which had a marked effect on the economies and workers in some Sunbelt cities that had been heavily dependent on defense-related industries (see p. 88).

In this last example we see again the mediating role of economic change. Indeed, politics has become intimately related to economic development. Economic issues are important to people and almost always appear in local elections, while both the need for local services and the ability to pay for them by people living in cities are functions of local

economic prosperity. As suggested by the direction of the arrows in Figure 1.4, urbanization also directly affects political change in some ways. One example is the way that coalitions of urban voters shaped the basis of modern party politics at the national level during the 1930s and 1940s in the United States (p. 239). Another is the electoral significance of suburban voters who have more recently formed an important foundation of support for the Republican Party. Urbanization also affects political change indirectly through people’s perceptions of the problems associated with various dimensions of urban change, because their perceptions inform and frame many of the issues that are contested in the political arena.

Cultural Change

We can find parallel examples of the interdependence of urbanization and cultural change. The broad cultural shift of the “postmodernity” (p. 338) of the 1980s, for example, brought, among other things, a renewed interest in the past that has engaged many people and found expression in urban form through historic preservation and the recycling of architectural styles. Meanwhile, urbanization has contributed to cultural dynamics through the youth subcultures— distinguished by features such as clothing, slang, music, and vehicles, including skateboards—that have flourished in certain urban settings. Other aspects of the interdependence between urbanization and culture involve still further processes of change. The materialism of mainstream American culture, for example, has affected urbanization through home ownership trends and patterns of residential development, but it has depended on processes of economic change that have been associated with workers’ wages not keeping pace and rising personal debt (see p. 318). It is not only (or always) economic change that is important in mediating such

FIGURE 1.6 People disembarking the ferry at Coronado Island, with the skyline of San Diego, California, in the background. The economic and demographic profile of San Diego has been influenced by its military bases, climate, scenery, recreational opportunities, and proximity to the Mexican border.

interrelationships. As we will see (p. 96), demographic change is also important, the “baby boom” generation having been the innovators and “carriers” of successive aspects of cultural change from the counterculture of the 1960s to the yuppie materialism of the 1980s and the “suburban bling” of the private master-planned developments of the 2000s.

Technological Change

At the broadest level, and in parallel with the overall evolution of capitalism, we should recognize that the economy has been carried along by a succession of technology systems that have been fundamental to the changing conditions that producers have had to confront. These are indicated in Figure 1.5 in terms of the clusters of energy sources, transportation technologies, and key industries that characterized each system:

• Early mechanization based on waterpower and steam engines; the development of cotton textiles, pottery, and iron working; and the development of river systems, canals, and turnpike roads for the assembly of raw materials and the distribution of finished products for sale to consumers.

• The development of coal-powered steam engines, steel products, railroads, world shipping, and machine tools that affected workers everywhere.

• The development of the internal combustion engine, oil and plastics, electrical and heavy engineering, cars, aircraft, radio, and telecommunications whose legacy continues for people in cities today.

• The exploitation of nuclear power, the development of limited access highways, durable consumer goods industries, aerospace industries, electronics, and petrochemicals were a further breakthrough affecting people in cities.

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Objection has often been taken, especially by philosophical writers, to the crudeness of Einstein’s initial requisitions, viz. a clock and a measuring scale. But the body of experimental knowledge of the world which Einstein’s theory seeks to set in order has not come into our minds as a heaven-sent inspiration; it is the result of a survey in which the clock and the scale have actually played the leading part. They may seem very gross instruments to those accustomed to the conceptions of atoms and electrons, but it is correspondingly gross knowledge that we have been discussing in the chapters concerned with Einstein’s theory. As the relativity theory develops, it is generally found desirable to replace the clock and scale by the moving particle and light-ray as the primary surveying appliances; these are test bodies of simpler structure. But they are still gross compared with atomic phenomena. The light-ray, for instance, is not applicable to measurements so refined that the diffraction of light must be taken into account. Our knowledge of the external world cannot be divorced from the nature of the appliances with which we have obtained the knowledge. The truth of the law of gravitation cannot be regarded as subsisting apart from the experimental procedure by which we have ascertained its truth.

The conception of frames of space and time, and of the nonemptiness of the world described as energy, momentum, etc., is bound up with the survey by gross appliances. When they can no longer be supported by such a survey, the conceptions melt away into meaninglessness. In particular the interior of the atom could not conceivably be explored by a gross survey. We cannot put a clock or a scale into the interior of an atom. It cannot be too strongly insisted that the terms distance, period of time, mass, energy, momentum, etc., cannot be used in a description of an atom with the same meanings that they have in our gross experience. The atomic physicist who uses these terms must find his own meanings for them —must state the appliances which he requisitions when he imagines them to be measured. It is sometimes supposed that (in addition to electrical forces) there is a minute gravitational attraction between an atomic nucleus and the satellite electrons, obeying the same law

as the gravitation between the sun and its planets. The supposition seems to me fantastic; but it is impossible to discuss it without any indication as to how the region within the atom is supposed to have been measured up. Apart from such measuring up the electron goes as it pleases “like the blessed gods”.

We have reached a point of great scientific and philosophic interest. The ten principal coefficients of curvature of the world are not strangers to us; they are already familiar in scientific discussion under other names (energy, momentum, stress). This is comparable with a famous turning-point in the development of electromagnetic theory. The progress of the subject led to the consideration of waves of electric and magnetic force travelling through the aether; then it flashed upon Maxwell that these waves were not strangers but were already familiar in our experience under the name of light. The method of identification is the same. It is calculated that electromagnetic waves will have just those properties which light is observed to have; so too it is calculated that the ten coefficients of curvature have just those properties which energy, momentum and stress are observed to have. We refer here to physical properties only. No physical theory is expected to explain why there is a particular kind of image in our minds associated with light, nor why a conception of substance has arisen in our minds in connection with those parts of the world containing mass.

This leads to a considerable simplification, because identity replaces causation. On the Newtonian theory no explanation of gravitation would be considered complete unless it described the mechanism by which a piece of matter gets a grip on the surrounding medium and makes it the carrier of the gravitational influence radiating from the matter. Nothing corresponding to this is required in the present theory. We do not ask how mass gets a grip on space-time and causes the curvature which our theory postulates. That would be as superfluous as to ask how light gets a grip on the electromagnetic medium so as to cause it to oscillate. The light is the oscillation; the mass isthe curvature. There is no causal effect to be attributed to mass; still less is there any to be attributed to

matter. The conception of matter, which we associate with these regions of unusual contortion, is a monument erected by the mind to mark the scene of conflict. When you visit the site of a battle, do you ever ask how the monument that commemorates it can have caused so much carnage?

The philosophic outcome of this identification will occupy us considerably in later chapters. Before leaving the subject of gravitation I wish to say a little about the meaning of spacecurvature and non-Euclidean geometry.

Non-Euclidean Geometry. I have been encouraging you to think of space-time as curved; but I have been careful to speak of this as a picture, not as a hypothesis. It is a graphical representation of the things we are talking about which supplies us with insight and guidance. What we glean from the picture can be expressed in a more non-committal way by saying that space-time has nonEuclidean geometry. The terms “curved space” and “non-Euclidean space” are used practically synonymously; but they suggest rather different points of view. When we were trying to conceive finite and unbounded space (p. 81) the difficult step was the getting rid of the inside and the outside of the hypersphere. There is a similar step in the transition from curved space to non-Euclidean space—the dropping of all relations to an external (and imaginary) scaffolding and the holding on to those relations which exist within the space itself.

If you ask what is the distance from Glasgow to New York there are two possible replies. One man will tell you the distance measured over the surface of the ocean; another will recollect that there is a still shorter distance by tunnel through the earth. The second man makes use of a dimension which the first had put out of mind. But if two men do not agree as to distances, they will not agree as to geometry; for geometry treats of the laws of distances. To forget or to be ignorant of a dimension lands us into a different geometry. Distances for the second man obey a Euclidean geometry

of three dimensions; distances for the first man obey a nonEuclidean geometry of two dimensions. And so if you concentrate your attention on the earth’s surface so hard that you forget that there is an inside or an outside to it, you will say that it is a twodimensional manifold with non-Euclidean geometry; but if you recollect that there is three-dimensional space all round which affords shorter ways of getting from point to point, you can fly back to Euclid after all. You will then “explain away” the non-Euclidean geometry by saying that what you at first took for distances were not the proper distances. This seems to be the easiest way of seeing how a non-Euclidean geometry can arise—through mislaying a dimension—but we must not infer that non-Euclidean geometry is impossible unless it arises from this cause.

In our four-dimensional world pervaded by gravitation the distances obey a non-Euclidean geometry. Is this because we are concentrating attention wholly on its four dimensions and have missed the short cuts through regions beyond? By the aid of six extra dimensions we can return to Euclidean geometry; in that case our usual distances from point to point in the world are not the “true” distances, the latter taking shorter routes through an eighth or ninth dimension. To bend the world in a super-world of ten dimensions so as to provide these short cuts does, I think, help us to form an idea of the properties of its non-Euclidean geometry; at any rate the picture suggests a useful vocabulary for describing those properties. But we are not likely to accept these extra dimensions as a literal fact unless we regard non-Euclidean geometry as a thing which at all costs must be explained away.

Of the two alternatives—a curved manifold in a Euclidean space of ten dimensions or a manifold with non-Euclidean geometry and no extra dimensions—which is right? I would rather not attempt a direct answer, because I fear I should get lost in a fog of metaphysics. But I may say at once that I do not take the ten dimensions seriously; whereas I take the non-Euclidean geometry of the world very seriously, and I do not regard it as a thing which needs explaining away. The view, which some of us were taught at

school, that the truth of Euclid’s axioms can be seen intuitively, is universally rejected nowadays. We can no more settle the laws of space by intuition than we can settle the laws of heredity. If intuition is ruled out, the appeal must be to experiment—genuine openminded experiment unfettered by any preconception as to what the verdict ought to be. We must not afterwards go back on the experiments because they make out space to be very slightly nonEuclidean. It is quite true that a way out could be found. By inventing extra dimensions we can make the non-Euclidean geometry of the world depend on a Euclidean geometry of ten dimensions; had the world proved to be Euclidean we could, I believe, have made its geometry depend on a non-Euclidean geometry of ten dimensions. No one would treat the latter suggestion seriously, and no reason can be given for treating the former more seriously.

I do not think that the six extra dimensions have any stalwart defenders; but we often meet with attempts to reimpose Euclidean geometry on the world in another way. The proposal, which is made quite unblushingly, is that since our measured lengths do not obey Euclidean geometry we must apply corrections to them—cook them —till they do. A closely related view often advocated is that space is neither Euclidean nor non-Euclidean; it is all a matter of convention and we are free to adopt any geometry we choose.[27] Naturally if we hold ourselves free to apply any correction we like to our experimental measures we can make them obey any law; but was it worth while saying this? The assertion that any kind of geometry is permissible could only be made on the assumption that lengths have no fixed value—that the physicist does not (or ought not to) mean anything in particular when he talks of length. I am afraid I shall have a difficulty in making my meaning clear to those who start from the assumption that my words mean nothing in particular; but for those who will accord them some meaning I will try to remove any possible doubt. The physicist is accustomed to state lengths to a great number of significant figures; to ascertain the significance of these lengths we must notice how they are derived; and we find that

they are derived from a comparison with the extension of a standard of specified material constitution. (We may pause to notice that the extension of a standard material configuration may rightly be regarded as one of the earliest subjects of inquiry in a physical survey of our environment.) These lengths are a gateway through which knowledge of the world around us is sought. Whether or not they will remain prominent in the final picture of world-structure will transpire as the research proceeds; we do not prejudge that. Actually we soon find that space-lengths or time-lengths taken singly are relative, and only a combination of them could be expected to appear even in the humblest capacity in the ultimate worldstructure. Meanwhile the first step through the gateway takes us to the geometry obeyed by these lengths—very nearly Euclidean, but actually non-Euclidean and, as we have seen, a distinctive type of non-Euclidean geometry in which the ten principal coefficients of curvature vanish. We have shown in this chapter that the limitation is not arbitrary; it is a necessary property of lengths expressed in terms of the extension of a material standard, though it might have been surprising if it had occurred in lengths defined otherwise. Must we stop to notice the interjection that if we had meant something different by length we should have found a different geometry? Certainly we should; and if we had meant something different by electric force we should have found equations different from Maxwell’s equations. Not only empirically but also by theoretical reasoning, we reach the geometry which we do because our lengths mean what they do.

I have too long delayed dealing with the criticism of the pure mathematician who is under the impression that geometry is a subject that belongs entirely to him. Each branch of experimental knowledge tends to have associated with it a specialised body of mathematical investigations. The pure mathematician, at first called in as servant, presently likes to assert himself as master; the connexus of mathematical propositions becomes for him the main subject, and he does not ask permission from Nature when he wishes to vary or generalise the original premises. Thus he can

arrive at a geometry unhampered by any restriction from actual space measures; a potential theory unhampered by any question as to how gravitational and electrical potentials really behave; a hydrodynamics of perfect fluids doing things which it would be contrary to the nature of any material fluid to do. But it seems to be only in geometry that he has forgotten that there ever was a physical subject of the same name, and even resents the application of the name to anything but his network of abstract mathematics. I do not think it can be disputed that, both etymologically and traditionally, geometry is the science of measurement of the space around us; and however much the mathematical superstructure may now overweigh the observational basis, it is properly speaking an experimental science. This is fully recognised in the “reformed” teaching of geometry in schools; boys are taught to verify by measurement that certain of the geometrical propositions are true or nearly true. No one questions the advantage of an unfettered development of geometry as a pure mathematical subject; but only in so far as this subject is linked to the quantities arising out of observation and measurement, will it find mention in a discussion of the Nature of the Physical World.

[19] Cylindrical curvature of the world has nothing to do with gravitation, nor so far as we know with any other phenomenon. Anything drawn on the surface of a cylinder can be unrolled into a flat map without distortion, but the curvature introduced in the last chapter was intended to account for the distortion which appears in our customary flat map; it is therefore curvature of the type exemplified by a sphere, not a cylinder.

[20] This relativity with respect to a standard unit is, of course, additional to and independent of the relativity with respect to the observer’s motion treated in chapter II.

[21] In so far as these casual influences are not entirely eliminated by the selection of material and the precautions in using the rod, appropriate corrections must be applied. But the rod must not be corrected for essential characteristics of the space it is measuring. We correct the reading of a voltmeter for temperature, but it would be nonsensical to correct it for effects of the applied voltage. The distinction between casual and

essential influences those to be eliminated and those to be left in depends on the intention of the measurements. The measuring rod is intended for surveying space, and the essential characteristic of space is “metric”. It would be absurd to correct the readings of our scale to the values they would have had if the space had some other metric. The region of the world to which the metric refers may also contain an electric field; this will be regarded as a casual characteristic since the measuring rod is not intended for surveying electric fields. I do not mean that from a broader standpoint the electric field is any less essential to the region than its peculiar metric. It would be hard to say in what sense it would remain the same region if any of its qualities were other than they actually are. This point does not trouble us here, because there are vast regions of the world practically empty of all characteristics except metric, and it is to these that the law of gravitation is applied both in theory and in practice. It has seemed, however, desirable to dwell on this distinction between essential and casual characteristics because there are some who, knowing that we cannot avoid in all circumstances corrections for casual influences, regard that as license to adopt any arbitrary system of corrections a procedure which would merely have the effect of concealing what the measures can teach us about essential characteristics.

[22] A. N. Whitehead, The Principle ofRelativity, Preface.

[23] On the other hand a quantum (see chapter IX) has a definite periodicity associated with it, so that it must be able to measure itself against a time-extension. Anyone who contemplates the mathematical equations of the new quantum theory will see abundant evidence of the battle with the intervening symbol

[24] Hegel, Werke (1842 Ed.), Bd. 7, Abt. 1, p. 97.

[25] Because I can attach no meaning to an orbit other than an orbit in space and time, i.e. as located by measures. But I could not assume that the alternative orbit would be meaningless (inconsistent with possible measures) until I tried it.

[26] See p. 236.

[27] As a recent illustration of this attitude I may refer to Bertrand Russell’s Analysis of Matter, p. 78 a book with which I do not often seriously disagree. “Whereas Eddington seems to regard it as necessary to adopt Einstein’s variable space, Whitehead

regards it as necessary to reject it. For my part, I do not see why we should agree with either view; the matter seems to be one of convenience in the interpretation of formulae.” Russell’s view is commended in a review by C. D. Broad. See also footnote, p. 142.

Chapter VIII

MAN’S PLACE IN THE

UNIVERSE

The Sidereal Universe. The largest telescopes reveal about a thousand million stars. Each increase in telescopic power adds to the number and we can scarcely set a limit to the multitude that must exist. Nevertheless there are signs of exhaustion, and it is clear that the distribution which surrounds us does not extend uniformly through infinite space. At first an increase in light-grasp by one magnitude brings into view three times as many stars; but the factor diminishes so that at the limit of faintness reached by the giant telescopes a gain of one magnitude multiplies the number of stars seen by only 1.8, and the ratio at that stage is rapidly decreasing. It is as though we are approaching a limit at which increase of power will not bring into view very many additional stars.

Attempts have been made to find the whole number of stars by a risky extrapolation of these counts, and totals ranging from 3000 to 30,000 millions are sometimes quoted. But the difficulty is that the part of the stellar universe which we mainly survey is a local condensation or star-cloud forming part of a much greater system. In certain directions in the sky our telescopes penetrate to the limits of the system, but in other directions the extent is too great for us to fathom. The Milky Way, which on a dark night forms a gleaming belt round the sky, shows the direction in which there lie stars behind stars until vision fails. This great flattened distribution is called the Galactic System. It forms a disc of thickness small compared to its a real extent. It is partly broken up into subordinate condensations, which are probably coiled in spiral form like the spiral nebulae which are observed in great numbers in the heavens. The centre of the galactic system lies somewhere in the direction of the constellation Sagittarius; it is hidden from us not only by great distance but also

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