Abstract: Records of the non-stock corporation which publishes The Progressive magazine, documenting its publishing history and the magazine's support of progressive causes, including civil rights, civil liberties, environmental topics, and opposition to U.S. involvement in Vietnam and Latin America. Included are extensive files of correspondence, particularly during editor Morris H. Rubin's tenure (1940-1973), smaller files of reorganizational, circulation, promotional material, a small number of manuscript articles, and other materials.