Who would have guessed that in the 30 years following the Civil Rights Act, the once close-knit African American community would become divided along class lines? In this 1998 interview from FRONTLINE's "The Two Nations of Black America," Harvard sociologist Dr. William Julius Wilson examines the economic disparities among African Americans and explains why, despite an overall increase in the standard of living, a segment of the population is falling farther and farther behind.