For most of the past century, urban America was dominated by top-down policies serving the white business and cultural elite, the suburbs, and the automobile. At times these approaches were fiercely challenged by reformers such as Jane Addams and Jane Jacobs. Yet by the 1980s, mainstream policies had resulted in a nation of ravaged central cities, sprawling suburbs, social and economic polarization, and incalculable environmental damage. In the 1990s, this entrenched model finally yielded to cha