The Social Democratic League of America was a short-lived social-democratic political party established in 1917 by electorally-oriented socialists who favored the participation of the United States in
The Social Democratic League of America was the brainchild of John Spargo, a pro-war member of the Socialist Party of America who quit the organization in May 1918.
Founders of the Social Democratic League of America c. 1918. (L-R): T. J. Mead, Nicholas Klein, W. J. Ghent, Lucien Sanial, Judge Levy, Nachman Syrkin, Maurice Kass, Henry Slobodin, William Edlin, W. F. Cochran, John Spargo.