This document summarizes the three phases of public school desegregation in the American South from 1955-1977 based on the study by Black and Black. Phase 1 from 1955-1964 saw massive white resistance to desegregation. Phase 2 from 1965-1968 saw increased desegregation efforts spurred by federal intervention. Phase 3 from 1969-1977 saw more rigorous judicial intervention reinforced by administrative sanctions. The study found that by the late 1970s, almost all black students in the South attended desegregated schools, though isolation persisted in large cities and some rural areas. It also discusses the partial penetration of the "intermediate color line" in areas like education, employment, and family income by the late 1960s-1970s, but