He lost his security clearance in 1953, in part due to testimony against him by Edward Teller, with whom he had disagreed regarding the wisdom of constructing a hydrogen bomb.  
His inheritance of $300,000 after his father's death enabled him to become involved in politics by funding many left-wing causes. Receiving his Ph.D. at 22 under Max Born, in 1947 he became the director of the Institute for Advanced Studies, and during the 1930s and 40s, the FBI was greatly confused by the addition of a superfluous letter to his name. He lost his security clearance in 1953, in part due to testimony against him by Edward Teller, with whom he had disagreed regarding the wisdom of constructing a hydrogen bomb.  Rumored to have said after seeing the test at Alamogordo, "I am become death, destroyer of worlds," FTP, identify this Caltech and Berkeley physicist, whose centennial was recently celebrated at Berkeley and who, with Born, is the namesake of a quantum-mechanical approximation.
His inheritance of $300,000 after his father's death enabled him to become involved in politics by funding many left-wing causes.
J. Robert Oppenheimer