William F. Kruse

William F. Kruse (1894–1979) was an important head of the Young People's Socialist League (YPSL) in the 1910s. He was a member of the Socialist Party of America until 1921, acting as a leader of the party's Left Wing faction, loyal to the Third International (Comintern). Thereafter he joined the Workers Party of America, serving as assistant executive secretary of the WPA from the time of its foundation in December 1921. Provided by Wikipedia