Earlier quoted context omitted.
For the record, the great depression didn't end until after WW2. War productions does not make prosperous societies simply because the allocation of resource is redirected to military purpose, not to civilian needs.
I don't know when exactly it ended but I'm quite certain there was little time to continue experimenting with socialist schemes when one is under attack. Industry needed to be able to function in order to produce everything required to win. And, yes, war is NOT good for the economy or anything else, other than repelling invaders. When all your shit's blown up, you ain't got shit. I figure that without the wars of the…
So on the one hand, you are right, war is a destroyer of wealth. But on the other hand, the US benefitted enormously from it. The net effect was to concentrate wealth that would have existed in territories of its rivals to it.