Albert Eustace Haydon, Ph.D. (University of Chicago, 1918; M.A., University of Saskatchewan, 1912; B.A., B.Th., B.D., and M.A., McMaster University), was a historian of religion and influential leader of the humanist movement, one of signers of the original Humanist Manifesto of 1933 and the 1956 Humanist of the Year, an award given by The American Humanist Association. Haydon was also served as minister at the First Unitarian Society of Madison, Wisconsin, and Professor Emeritus and head of the Department of Comparative Religion at the University of Chicago.