Jared Diamond is an American scientist, professor, and Pulitzer Prize-winning author. He is best known for his work in the fields of evolutionary biology, anthropology, and ecology. He is a professor of geography at UCLA and a MacArthur Fellow. Diamond's most famous work is his 1997 book Guns, Germs, and Steel, which examines the history of human societies and their development. He has also written several other books, including Collapse: How Societies Choose to Fail or Succeed, The World Until Yesterday, and Upheaval: Turning Points for Nations in Crisis. Diamond's research focuses on the environmental and evolutionary factors that shape human societies. He has studied the effects of geography, climate, and other environmental factors on the development of human societies, and has explored the ways in which societies have adapted to their environments. He has also studied the effects of human activities on the environment, and the ways in which societies can become more sustainable. Diamond's work has been widely praised for its insight and clarity. He has been awarded numerous honors, including the National Medal of Science, the Tyler Prize for Environmental Achievement, and the MacArthur Fellowship. He has also been awarded the Pulitzer Prize for General Nonfiction for his book Guns, Germs, and Steel.