Naomi Alderman explores the multifaceted mind of J Robert Oppenheimer, scientific lead on the Manhattan Project, a vast, top secret scheme to build the world's first atomic bombs in World War II.

The Project was a remarkable feat of human intellect with a real, devastating human cost. It required close cooperation between the US military and a group of world-leading scientists. In many ways, Oppenheimer was a puzzling candidate for the job. He was brilliant, but fuelled by self-loathing. A physicist, he was also a student of philosophy and mysticism, interested in left-wing radical politics. Oppenheimer built the bomb, but later called the weapon's industry "the devil's work". His legacy, like the Manhattan Project itself, is infinitely complex.

Special thanks to Alex Wellerstein, historian of science at the Stevens Institute of Technology in Hoboken, New Jersey, and author of The Most Awful Responsibility: Truman and the Secret Struggle for Control of the Atomic Age (HarperCollins, 2025).

Produced by BBC Studios Audio in partnership with The Open University.