That said, if e.g. only the US had nukes after WW2, they would be the world's dictator. I mean they already are very influential everywhere, but they don't have absolute power at least. Still wouldn't want to be at war with them though.
The other side of the coin was the Rosenbergs were blamed for casualties in the Korean war.
https://en.wikipedia.org/wiki/Klaus_Fuchs
"In her 2020 book, Atomic Spy: The Dark Lives of Klaus Fuchs, Nancy Thorndike Greenspan concluded that "Fuchs sought 'the betterment of mankind' [when sharing secrets with the Soviets] ... because "his goal became to balance world power and to prevent nuclear blackmail" according to a New York Times review by the conservative historian Ronald Radosh. Radosh wrote that "this was a post facto justification. The reason Fuchs spied was simply that he was a Communist and a true believer in Stalin and the Soviet Union"."