Recent theories of the urban underclass have systematically ignored ra
cial segregation in American cities. As a result, they have not come t
o terms with one of the fundamental causes of urban poverty. African A
mericans are uniquely segregated among U.S. racial and ethnic groups.
This segregation is not voluntary, but stems from white prejudice, ins
titutional discrimination, and racist public policies. The segregation
of African Americans blocks normal processes of socioeconomic mobilit
y and leads to a concentration of poverty in black neighborhoods. This
concentration of poverty creates a social environment within which so
cioeconomic disadvantage is created and perpetuated. Unless efforts ar
e made to attack the forces of racial segregation, other efforts to im
prove the welfare of African Americans will fail.