Until the last quarter of the 20th century racially explicit policies of federal, state, and local governments defined where whites and African Americans should live. Today's residential segregation in the North, South, Midwest, and West is not the unintended consequence of individual choices and of otherwise well-meaning law or regulation but is…

As the early twentieth century's restrictive social policies and poor economic conditions relegated African Americans in St. Louis, Mo. to high poverty neighborhoods, parents were forced to enroll their children in substandard segregated schools. Meanwhile the African American population increased in size from 108,765 (11.4 percent) in 1940 to…