Jared Mason Diamond (born September 10, 1937) is an American geographer, historian, anthropologist, and author best known for his popular science books The Third Chimpanzee (1991); Guns, Germs, and Steel (1997, awarded a Pulitzer Prize); Collapse (2005), The World Until Yesterday (2012), and Upheaval (2019). Originally trained in physiology, Diamond is known for drawing from a variety of fields, including anthropology, ecology, geography, and evolutionary biology.