In this extensive study, Roberta Cohen identifies, as only a true insider can, the lessons learned from the development of the Guiding Principles on Internal Displacement that may prove useful to those seeking to develop standards in new and emerging fields. In charting the evolution and drafting of the Guiding Principles, Cohen elucidates key components and milestones that set the stage for 193 heads of state to recognize the Principles as "an important international framework for the protection of internally displaced persons" at the 2005 World Summit. Cohen's candid examination of the impact of the Guiding Principles, including the limitations and benefits accruing from their development through a non-governmental process, lends weight to her concluding remarks, which identify a series of steps for experts seeking to develop similar principles in other fields.