Leó Szilárd
Following his experiences of the after-effects of the Nagasaki and Hiroshima bombings, he discontinued his work for British military research and turned to biology, as did his friend Leó Szilárd, and many other physicists of that time, to better understand the nature of violence. Subsequently, he became Director of Research for the National Coal Board in the UK, and an associate director of the Salk Institute from 1964.