The Great Migration significantly impacted American cities, particularly in the early to mid-20th century, as millions of African Americans relocated from the rural South to urban areas in the North and West. Motivated by the search for better economic opportunities and an escape from Jim Crow laws, this migration transformed the demographics of cities like Chicago, Detroit, and New York. It led to the establishment of vibrant cultural communities and movements, including the Harlem Renaissance. This demographic shift also influenced politics, labor movements, and civil rights activism, reshaping American social and cultural dynamics.