Sir JosephRotblat KCMG CBE FRSwas a Polish physicist, a self-described "Pole with a British passport". Rotblat was the only physicist to leave the Manhattan Projecton the grounds of conscience. Rotblat's work on nuclear fallout was a major contribution toward the ratification of the 1963 Partial Nuclear Test Ban Treaty. A signatory of the Russell–Einstein Manifesto, he was secretary-general of the Pugwash Conferences on Science and World Affairs from their founding until 1973. He shared, with the Pugwash Conferences, the 1995...
(wikipedia)