What do you mean by "post-WW2 world order", in this case? Without that, it's hard to even make claims about what happens when the US stops "enforcing it" with.

What do you mean by "post-WW2 world order", in this case? Without that, it's hard to even make claims about what happens when the US stops "enforcing it" with. Does the US simply stop pouring in development aid into countries? Does it stop attracting world-class talent into research institutions, and eventually industries? Does it stop having significant heft in trade negotiations because of that? On one hand, there are specific things that the US _could_ stop doing: not selling arms left and right, and bombing third countries. Maybe you might not call that a meaningful change in the "post-WW2 world order" – but we'd argue that's the case, since it has been a consistent feature of the post-WW2 world order. It's also a very big leap to assume that the middle class of any country would suffer after whatever is assumed here happens. Why would you assume that Russia and China not be interested in that? Moreover, why would you assume that Russia and China would _not_ want "trading, industry, technology and education" in the absence of great power competition?