Freeman John Dyson FRS (born December 15, 1923) is an English-born American theoretical physicist and mathematician, famous for his work in quantum mechanics, solid-state physics, nuclear engineering, and for his serious theorizing in futurism and science fiction concepts, including the search for extraterrestrial intelligence. He is a lifelong opponent of nationalism and a proponent of nuclear disarmament and international cooperation. Dyson is a member of the Board of Sponsors of The Bulletin of the Atomic Scientists.
