While he was proven wrong, his point was correct: WWI and WWII were economically disastrous to everyone involved except for the US. And in that case only because the US suffered no major damage to its infrastructure.
There's no way rational actors would start a war on the size of WWII. Only human insanity can cause another one. While that's no guarantee, it is still a strong preventative factor.
There's no way rational actors would start a war on the size of WWII. Only human insanity can cause another one. While that's no guarantee, it is still a strong preventative factor.