This is the fourth edition of the classic text for students of urban and regional planning. It gives a historical overview of the developments and changes in the theory and practice of planning, throughout the entiretwentieth century.This extensively revised edition follows the successful format of previous editions. Specific reference is made to the most important British developments in recent times, including the devolution of Scotland, Wales and Northern Ireland, the establishment of the Mayor of London and the dominant urban sustainability paradigm.Planning in Western Europe, since 1945, now incorporates new material on EU-wide issues as well as updated country specific sections. Planning in the United States since 1945, now discusses the continuing trends of urban dispersal and social polarisation, as well as initiatives in land use planning and transportation policies.The book looks at the nature of the planning process at the end of the twentieth century and looks forward to the twenty-first century.