Best remembered as a signer of the famous 1945 Franck Report, this nuclear physicist urged the United States government to abandon its plans to detonate atomic bombs over Hiroshima and Nagasaki, Japan at the end of World War II.
Early in his career, he worked for The Naval Ordnance Laboratory in White Oak, Maryland.
After World War II, he worked as a nuclear science researcher at the Brookhaven National Laboratory on Long Island, New York.
He passed away suddenly at the age of forty-five.
Against the advice of Hughes and other signers of the Franck Report, the American government authorized the wartime use of the atomic bombs that had been developed by J. Robert Oppenheimer and his Manhattan Project team.