J. Robert Oppenheimer.

Born Julius Robert Oppenheimer on April 22, 1904, in New York City, he was the son of a wealthy textile importer and a painter. He attended the Ethical Culture Fieldston School, a progressive school in New York, where he excelled in science and languages. He entered Harvard University in 1922, graduating in three years with a degree in chemistry. He then studied at the University of Cambridge’s Cavendish Laboratory and earned his doctorate at the University of Göttingen in 1927, where he worked under Max Born. His younger brother, Frank Oppenheimer, also became a physicist and later worked on the Manhattan Project.

In 1929, Oppenheimer became a professor of physics at the University of California, Berkeley, where he built a school of theoretical physics. During World War II, he was appointed director of the Los Alamos Laboratory in New Mexico in 1943, tasked with creating an atomic bomb. On July 16, 1945, he observed the Trinity test, the first detonation of a nuclear weapon. He later said the explosion brought to mind words from the Bhagavad Gita: Now I am become Death, the destroyer of worlds. After the war, he served as chairman of the General Advisory Committee to the Atomic Energy Commission and was awarded the Enrico Fermi Award in 1963. His security clearance was revoked in 1954 following a controversial hearing during the Second Red Scare, effectively ending his government service.

Oppenheimer married Katherine Harrison Puening in November 1940. They had two children: Peter and Toni. Friends called him Oppie. He was a slender man, weighing only about 120 pounds for much of his adult life. He was the older brother of physicist Frank Oppenheimer, whose career also suffered during the McCarthy era. His third cousin is actor Alan Oppenheimer. He was diagnosed with throat cancer in 1965 and died on February 18, 1967, at his home in Princeton, New Jersey.

J. Robert Oppenheimer is remembered as the father of the atom bomb for his role in the Manhattan Project. His quote from the Bhagavad Gita became one of the most famous remarks about nuclear weapons. He has been portrayed in films by actors including Sam Waterston in 1980, Dwight Schultz in 1989, and Cillian Murphy in Christopher Nolan’s 2023 film Oppenheimer. His life inspired documentaries such as The Day After Trinity 1981 and To End All War: Oppenheimer & the Atomic Bomb 2023. He was nominated for the 2025 New Jersey Hall of Fame in the Education, Research, Engineering and Science category. Despite the controversies, his scientific contributions and ethical reflections continue to shape debates on nuclear power and warfare.