Racial segregation characterizes every metropolitan area in the United States and bears responsibility for our most serious social and economic problems — it corrupts our criminal justice system, exacerbates economic inequality, and produces large academic gaps between white and African American schoolchildren. We’ve taken no serious steps to desegregate neighborhoods, however, because we are hobbled by a national myth that residential segregation is de facto — the result of private discrimination or personal choices that do not violate constitutional rights.