Most of the world's populations now live in cities. These cities, especially the big world cities are multicultural, they are melting pots of different people, with different ethnic backgrounds, classes and subcultures. How can these cosmopolitan cities respond to the economic, political and cultural demands and needs of so many different (and even opposing) groups? This text examines current theory and practice and challenges planners to build the new multicultural cities. It includes international coverage, with case material from USA, Latin America, Europe, Asia and Australia.