Correspondence, reports, memoranda, bulletins, clippings, serial issues, pamphlets, other printed matter, and photographs, relating to the Communist International, the communist movement in the United States and elsewhere, communist influence in American and foreign trade unions, and organized labor movements in the United States and abroad. Lovestone was General secretary, Communist Party, U.S.A., 1927-1929, and Communist Party (Opposition), 1929-1940; executive secretary, Free Trade Union Committee, American Federation of Labor, 1944-1955; assistant director and director, International Affairs Department, American Federation of Labor-Congress of Industrial Organizations, 1955-1974.