Enrico Fermi — "When we were working on the atomic bomb, we knew that we were doing something th…"
When we were working on the atomic bomb, we knew that we were doing something that would change the world forever.
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More from Enrico Fermi
"The atomic bomb is a testament to the power of human intellect, but it is also a warning about the dangers of human folly."
"I believe that the future of humanity depends on our ability to control the forces that we have unleashed."
"I hope it won't take long."
"The pursuit of knowledge is an endless journey."
"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."
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Understanding this quote
What it means
This quote expresses the profound collective awareness scientists felt during the Manhattan Project — that their work transcended ordinary research. They weren't merely solving physics equations; they were permanently reshaping civilization. The word 'forever' captures the irreversibility of nuclear weapons: once that knowledge existed, it could never be erased. It conveys both the weight of responsibility and the sobering recognition that science had crossed a threshold with no return.
Relevance to Enrico Fermi
Fermi built the first artificial nuclear reactor at Chicago Pile-1 in December 1942 and worked directly at Los Alamos on the bomb's physics. Famous for 'Fermi estimation' — solving vast unknowns with calm, disciplined reasoning — he embodied pragmatic genius. This quote reflects his characteristic directness: no moralizing, just clear-eyed acknowledgment that the physics he mastered carried civilization-scale consequences. His participation as an Italian immigrant who fled fascism added deeply personal stakes to that awareness.
The era
World War II (1939–1945) drove unprecedented government mobilization of science. Nazi Germany was pursuing its own nuclear program, creating genuine urgency. The Manhattan Project secretly employed over 130,000 people across multiple sites. When the Hiroshima and Nagasaki bombs fell in August 1945, they ended the Pacific War but launched the Cold War arms race, the Doomsday Clock, and the concept of mutually assured destruction — permanently binding scientific progress to existential geopolitical risk.
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