The collection contains the papers of Meryl and Manny Sunshine, socialist activists who were members of the Freedom Socialist Party, Radical Women, the Committee for a Revolutionary Socialist Party, the Peace and Freedom Party, and other organizations. It includes subject files, convention and conference materials, leaflets, photographs, bulletins, reports, memoranda, press releases, minutes, publications, election materials, and draft proposals.

The collection comprises bulletins, convention and forum constitutions, programs, and leaflets, correspondence, reports, flyers, and subject files relating to the Socialist Workers Party (SWP), which was founded in 1928 by James P. Cannon.

This collection contains bulletins, pamphlets, articles, and one conference transcript that reflect the theoretical sentiments and organizational activities of the Spartacist League of the U.S. The League was officially formed in 1966 by expelled members of the Revolutionary Tendency within the Socialist Workers Party. It is the United States section of the International Communist League (Fourth International).

The collection contains correspondence, reports, draft resolutions, bulletins, minutes, plenum and convention documents, and subject files related to Socialist Action, a Trotskyist political organization.

This collection includes material collected by Lyle Fulks, a member of the Socialist Workers Party and Solidarity. It includes material from other Socialist organizations, such as Workers Power, Socialist Action, and International Socialist. Besides material related to Socialist organizations, the collection also includes teaching syllabi, articles, personal material, and other subjects related to Socialism, Communism, Marxism, labor, and social justice.