J. Robert Oppenheimer

Julius Robert Oppenheimer was an American theoretical physicist whose intellectual versatility spanned quantum mechanics, astrophysics, spectroscopy, and nuclear physics. Educated at Harvard, Cambridge, and Göttingen under Max Born, he co-developed the Born-Oppenheimer approximation for molecular wavefunctions and made foundational early predictions regarding neutron stars and gravitational collapse leading to black holes.

In 1942, General Leslie Groves appointed Oppenheimer scientific director of Project Y—the secret Los Alamos Laboratory in New Mexico—orchestrating the Manhattan Project that designed and constructed the first nuclear weapons. Following the successful Trinity test on July 16, 1945, Oppenheimer famously recalled the line from the Hindu scripture Bhagavad Gita: 'Now I am become Death, the destroyer of worlds.' After the war, he served as chairman of the General Advisory Committee of the Atomic Energy Commission, lobbying against the hydrogen bomb and proliferation before being stripped of his security clearance in a controversial 1954 McCarthy-era hearing.