The Radical Pamphlets collection documents history, policies, and activities of organizations perceived as radical or the left wing of the political spectrum. The collection includes pamphlets, newsletters, periodicals, articles, advertisements, cartoons, handouts, poetry, and other ephemera, often limited in distribution. Over 900 titles; listed in University Libraries' CardCat.

For related materials, see University Archives (underground newspaper, The Only Alternative), Stoeckel Archives (records of various local organizations), and oral histories from Vietnam War era.