George Gaylord Simpson, Ph.D. (Geology, Yale University, 1926), was Professor of Geosciences at the University of Arizona from 1968 until his retirement in 1982. Previously was Curator of the Museum of Comparative Zoology at Harvard University 1959–1970, Curator of the Department of Geology and Paleontology at the American Museum of Natural History 1945–1959, and Professor of Zoology at Columbia University. He was awarded the Linnean Society of London's prestigious Darwin-Wallace Medal in 1958. Simpson also received the Royal Society's Darwin Medal 'In recognition of his distinguished contributions to general evolutionary theory, based on a profound study of palaeontology, particularly of vertebrates,' in 1962. In 1966, Simpson received the Golden Plate Award of the American Academy of Achievement.