I see; I didn't realize you were talking about European countries. Good points, IMHO.
I would add that much of what was destroyed in Europe was necessary to productive, advanced economic activity - factories and their contents, infrastructure, etc etc. The most valuable human capital (looking at it from a purely economic perspective) - young, able, working age adults - were the soldiers and disproportionately killed. And without functioning economies, they produced much less money to invest in rebuilding and growing.
However, the US population is still ~4x the size of any advanced European economy (Germany has ~80 million).
I would add that much of what was destroyed in Europe was necessary to productive, advanced economic activity - factories and their contents, infrastructure, etc etc. The most valuable human capital (looking at it from a purely economic perspective) - young, able, working age adults - were the soldiers and disproportionately killed. And without functioning economies, they produced much less money to invest in rebuilding and growing.
However, the US population is still ~4x the size of any advanced European economy (Germany has ~80 million).