Spargo SDL Seymour Stedman Charles P. Steinmetz A.M. Stirton J.G. Phelps Stokes ISS, SDL Rose Pastor Stokes * Maurice Sugar Norman Thomas Henry M. Tichenor Hermon F. Titus Gus Tyler Ernest Untermann Charles H. Vail Baruch Charney Vladeck Alfred Wagenknecht * Louis Waldman SDF Julius Wayland George W. Woodbey John M. Work Frank P. Zeidler SPUSA Annotated list Key: * Went on to join the Communist Party, Communist Labor Party of America or Workers Party of America ISS A founder or key member of the Intercollegiate Socialist Society, 1905, later League for Industrial Democracy IWW A founder of the Industrial Workers of the World, 1905. SDL Left to found the Social Democratic League of America, 1917. SDF Left to found the Social Democratic Federation, 1936. SDUSA Continued into Social Democrats, USA, 1973 SPUSA Went on to join the Socialist Party USA, 1973 DSOC Went on to join the Democratic Socialist Organizing Committee, 1973, later Democratic Socialists of America Martin Abern * Devere Allen Elmer Allison * E.B. "Harry" Ault J. Mahlon Barnes David P. Berenberg Victor L. Berger, Congressman from Milwaukee Barney Berlyn Allan L. Benson, 1916 candidate for Vice-President Ella Reeve Bloor * Roy E. Burt Frank Bohn IWW Earl Browder *, Communist Party leader and presidential candidate James P. Cannon *, leader of the Communist Party and Socialist Workers Party Jack Carney Travers Clement Joseph Coldwell James Connolly, Irish labor and nationalist leader Eugene V. Debs IWW, labor organizer, Presidential candidate David Dubinsky, labor leader Max Eastman *, writer J. Louis Engdahl William M. Feigenbaum, New York assemblyman 1918 Elizabeth Gurley Flynn *, IWW and Communist leader William Z. Foster *, Communist leader and presidential candidate Louis Fraina * Joseph Freeman * Samuel Friedman, Vice-presidential candidate Charles B. Garfinkel, New York assemblyman 1918, temporary chairman of the NYC central committee SPA in 1935 after Old Guard was expelled Julius Gerber Adolph Germer Arturo Giovannitti Benjamin Gitlow * Carl Haessler * Emanuel Haldeman-Julius SDL Job Harriman, Vice-presidential candidate Michael Harrington DSOC, author Hubert Harrison Max S. Hayes, labor leader Bill Haywood IWW Emil Herman George D. Herron Morris Hillquit ISS, labor lawyer, New York mayoral candidate Daniel Hoan, mayor of Milwaukee Darlington Hoopes SPUSA Jessie Wallace Hughan ISS Henry Jager, NY assemblyman 1921 Haim Kantorovitch William KarlinSDF, lawyer, NY assemblyman 1918 Helen Keller Charles H. Kerr, publisher George R. Kirkpatrick Antoinette Konikow * Frederick Krafft Maynard C. Krueger William