William L. Patterson
William Lorenzo Patterson (August 27, 1891 – March 5, 1980) was an African-American leader in the Communist Party USA and head of the International Labor Defense, a group offering legal representation to communists, trade unionists, and African Americans in cases involving alleged racial or political persecution. He was perhaps best known for submitting a petition to the UN in 1951, accusing the U.S. government of complicity in genocide against black people.