The Brown University Library has acquired access to the database, Political Extremism and Radicalism in the Twentieth Century, a compilation of rare and unique archival collections covering a wide range of fringe political movements from the 1900s – 2010s. This archive is one of the first digital archives covering such a broad assortment of both far-right and left political groups. It offers a diverse mixture of materials, including periodicals, campaign propaganda, government records, oral histories, and various ephemera.

Includes materials from the Hall-Hoag Collection of Dissenting and Extremist Printed Propaganda from the John Hay Library here at Brown University.