This chapter reviews the fascinating history of legal efforts to increase economic and racial diversity in housing. One approach, exemplified by the New Jersey Supreme Court's landmark Mount Laurel decision, required municipalities to guarantee a certain number of affordable housing units through inclusionary zoning of residential developments. Another, exemplified by the endless Yonkers litigation, sought diversity as part of a civil rights remedy. A third is the Gautreaux litigation seeking to move public housing tenants to the suburbs. I use these and other policy disputes to examine the law's effectiveness in promoting diversity in an area dominated by powerful market pressures, a strong classicist ethos, and competing diversity claims.