> If nukes were not invented yet, would it really be a good idea to build and sell them as fast as possible (in peace time, no less)?
Arguably, yes.
> If nukes were not invented yet, would it really be a good idea to build and sell them as fast as possible (in peace time, no less)?
Arguably, yes.
From Richard Rhode's "The Making of the Atomic Bomb", I got the impression that most scientists involved thought they could manage a US or UN monopoly on nukes after the war. General Groves attempted to buy up all of the world's uranium ore. Unfortunately, it is only high grade ore that is rare; many countries have low-grade ore.
If only the US or UN had nukes we would't have MAD. We mostly got here through espionage
Who’s invading North Korea? No-one.
If in the WW2 Japan also had nukes (and delivery systems for them) they'd probably have retaliated in kind and US wouldn't let that slide too and it would have continued for some time.
This is a maybe. What we’ve seen so far, no two nuclear superpowers ever nuked each other, as they know both will suffer.