Racism spread from the South to the North in the 1930s as African Americans migrated during the Great Depression and WWII. Black workers suffered disproportionately high unemployment rates compared to whites during the Depression. New Deal programs promoted equal hiring and wages but rarely benefited blacks in practice. Labor unions also excluded or segregated blacks. The experience of racism in the North during this time, as depicted in August Wilson's play The Piano Lesson, included unequal treatment under Jim Crow laws that enforced racial segregation until being challenged in the 1950s and 1960s.