This is utterly, completely false. Math and science were ruined in Germany and Italy approximately instantaneously, because the best scientists fled. Hilbert, who stayed in Germany b/c he was not a target and was too old and disabled to leave, openly said academic math was dead in Germany.
Even amongst those who didn't flee, promotion became politicised and you often got to be high up due to party loyalty rather than competence
I wonder if this idiot know who Enrico Fermi was
The making of the atomic bomb first half is mostly about genius scientists publishing in Europe and increasingly becoming wary or fleeing to the UK or America out of panic.
Well, if you exclude Teichmuller.
Japan, I'm not as familiar with, but there's a reason the US was overwhelmingly scientifically superior to all of its rivals during WW2 (and indeed, well ahead of its own allies!).
Japan was *better.* Mizuhashi was the first to come up with the idea of the Smith chart. *But* that meant little in terms of actual *use.* Because even if it was safer and the academy itself marginally less ideological, government and funding weren't.
Japan was kind of an exception which is also why the mad science they got up to was the only Axis Power mad science of any real utility post war
The pure sciences were way better off, but the industrial base was way less compared to the other Axis powers.
I think more so than Germany at an engineering level Japan suffered from resource constraints. Metals, elements, transport, humans.
If you look up brain drain on Wikipedia (aka human capital flight) the banner photo is literally Albert Einstein lol
*laughs in A-bomb and jet propulsion labs*
There was a whole thing about Deutsche Physik under Hitler and it was an abysmal failure! en.wikipedia.org/wiki/Deutsch...