Correspondence, speeches and writings, lectures, subject files, and other papers documenting the Mowrers' careers as authors and lecturers on foreign affairs, particularly on the diplomatic policies of France, Germany, Italy, and the United States. Records (1956-1960) of the periodical Western World while Edgar Ansel Mowrer was its American editor include articles by Raymond Aron, Arthur F. Burns, Jean Cocteau, James Bryant Conant, Hans Joachim Morgenthau, and Robert Strausz-Hupé. Also includes material on his expulsion from Nazi Germany in 1933, his service with the U.S. Office of Facts and Figures and U.S. Office of War Information, and his articles for the Manchester Union Leader and for his syndicated newspaper columns. Lilian T. Mowrer's papers document her activities with the Women's Action Committee for Lasting Peace and Women's World Fellowship and include reserach notes for her biography of a colonial Long Island landowner, The Indomitable John Scott (1960), and other works by both Mowrers. Other topics include the Vatican position on fascism and President Richard M. Nixon's policy of detente with China and the Soviet Union.

Correspondents include Dean Acheson, Norman Cousins, Myron M. Cowen, Thomas J. Dodd, John Dos Passos, Gertrude Enelow, Charles de Gaulle, Barry M. Goldwater, Christian Archibald Herter, Paul G. Hoffman, Hubert H. Humphrey, Estes Kefauver, Olga Kochanska, William Loeb, Nellie L. McClung, Paul Scott Mowrer, Richard Scott Mowrer, Allan Nevins, Richard M. Nixon, Lucien Radoux, James Reston, Abraham Ribicoff, Pierre Salinger, Vincent Sheean, William L. Shirer, Margaret Chase Smith, Boris Sokoloff, Paul-Henri Spaak, Adlai E. Stevenson, Leland Stowe, Clarence K. Streit, Arthur Sweetser, Lawrence W. Towner, and Victor Weybright.