In the decade since the Great Recession, the role of business in society has been a topic of constant debate. In a world defined by social, political and environmental change, we ask: can leader combine a social conscience with the fundamental drive of business to create wealth? How do leaders harness the power of purpose? Can business be a true source of sustainability, or must it fall to the state to deliver what the planet plainly needs? And, is it possible to measure the impact of good leadership?