The authors demonstrate that this systematic segregation of African Americans leads inexorably to the creation of underclass communities during periods of economic downturn. Under conditions of extreme segregation, any increase in the overall rate of black poverty yields a marked increase in the geographic concentration of indigence and the deterioration of social and economic conditions in black communities. As ghetto residents adapt to this increasingly harsh environment under a climate of racial isolation, they evolve attitudes, behaviors, and practices that further marginalize their neighborhoods and undermine their chances of success in mainstream American society. This book is a sober challenge to those who argue that race is of declining significance in the United States today.