The Willis mss., 1942-1945, consist of letters and documents of Hugh Evander Willis, 1875-1967, professor of law at Indiana University, dealing with Professor Willis' plan for achieving lasting peace through a federation of the world and with his proposals for the constitution of the United Nations.
The United World Federalists mss. IV, 1927-2011, consists of books, pamphlets, and research related to the United Nations, the environment, and generalized politics, as well as copies of World Federalist Association annual reports, the World Federalist News magazine, and miscellaneous related awards and conferences materials.
The United World Federalists mss., 1928-1988, consists of correspondence and records relating to the United World Federalists' history, organization, policies, and programs.
The United World Federalists mss. V, 1947-1974, consists of materials from international conferences, various publications, and individuals associated with the organization, including Garry Davis and Charles Heywood.
The Solidaridad International Antifascista mss., 1937-1941, consist of correspondence, receipts, membership lists, ephemera, and broadsides relating to the NY Headquarters of the SIA.
The Singer, J. D. mss., 1950-1961, consist of the correspondence and papers of J. David Singer relating to the World Federalist Association in New York.