Your comment made me wonder if there's an alternate history work of fiction where the atom bomb wasn't built.
Something like Man in the High Castle for WW2 victory or For All Mankind for the Space Race.
That would be a very interesting divergence to explore, with very interesting ramifications for the Cold War, especially if nuclear weapons do get invented later on, but without two bloody live-fire demonstrations to shock the world.
https://en.wikipedia.org/wiki/German_nuclear_weapons_program