The US civil protest movement against racial segregation and discrimination in the southern United States that came to national prominence during the mid-1950s. This movement had its roots in the centuries-long efforts of African slaves and their descendants to resist racial oppression and abolish the institution of slavery. Although American slaves were emancipated as a result of the Civil War and were then granted basic civil rights through the passage of the Fourteenth and Fifteenth amendments to the U.S. Constitution, struggles to secure federal protection of these rights continued during the next century.