>It took 4 years thanks in no small part to espionage efforts by the USSR. Part of the reason why this worked is people who didn't want a world where only the US had nuclear weapons. It would be too dangerous.

I believe the technical term for these kinds of people is "useful idiots". How exactly was the world made a safer place by Joseph Stalin having a nuclear bomb?

Try this thought experiment, at the end of WWII the Soviets have the bomb and the United States does not. Does Russia wait 20 years for the US to develop the bomb? Or do they attack as soon as the are able?

Which part of Stalin's morality guides his decision?