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The real Oppenheimer's complicated relationship with Judaism

While he tried his best to assimilate, J Robert Oppenheimer's faith was a constant theme throughout his career

July 26, 2023 15:29
Einstein oppenheimer
6 min read

When J Robert Oppenheimer travelled to New Mexico in 1942 to visit his best friend, he asked people to call him by a name that carefully masked his Jewish roots. He went by Robert Smith. It didn't stick, but this wasn’t the first time he had tried to mask his identity.

Throughout his life, he maintained that the J in J. Robert Oppenheimer didn’t stand for anything at all. But it did.

The man who called himself “destroyer of worlds,” and protagonist of the Nolan film Oppenheimer, was named after his father, Julius, but hid his name throughout his life to mask his Jewish roots.

His tendency to assimilate started with his background. Oppenheimer’s father was a member of the Ethical Culture movement in New York, a sort of “secularised version” of Reform Judaism.