Karl Otto Paetel was a political journalist, born in Berlin, forced to flee Germany in 1935 (Paetel was sentenced to death in absentia by the Nazis), and immigrated to the United States in 1940. Paetel's interests focused on the radical movements and social changes in the Twentieth Century from his youth until his death in 1975. The collection consists of correspondence, Paetel's writings, writings by others, pamphlets, biographical materials, and periodicals.

This collection contains photocopies of correspondence written by Manfred George to various public figures, original manuscripts of plays composed by George, newspaper clippings of articles George wrote for European and American publications, and audio recordings on his work with the New York based newspaper Aufbau.

The collection contains biographical materials, 1939-1957, correspondence, in part pertaining to Thomas Mann, and printed materials. A native of Breslau, Siegfried Marck taught at Roosevelt University from 1945.