Formation of Socialist Workers Party (1938)
Founding of Communist League of America (1928)
Minneapolis Teamsters Strike (1934)
Smith Act Trials (1941)
Split leading to Workers Party (1940)
Formation of International Socialist Organization (1977)
Civil rights activism
Antiwar activism
Expulsion from Communist Party USA (1928)
Involvement in anti-Vietnam War movement
Involvement in feminist movement
Participation in Black liberation movement
Participation in labor strikes