[4] Dean enrolled at Radcliffe College, and after graduating in 1925, she won a Carnegie Endowment fellowship to Yale University where she earned a M.A in international law.
[6] She became the main editor of the Association newspaper Foreign Policy Bulletin where she became a leading advocate of a collective security approach to American politics.
[5] Dean was appointed by Governor Herbert H. Lehman as his adviser for the first American delegation to the United Nations and later as a consultant for The San Francisco Conference.
[4][5] In 1949, General Lucius D. Clay arranged for Dean to travel throughout Europe, visiting Frankfurt, Berlin, Prague, Warsaw and London.
[4] After her death, Dean's personal papers, including her autobiography, was given to the Radcliffe College and are held in Harvard University library archives.