>That might work for a smaller country like South Africa, but China too big for that. China could probably make everything it needs itself, or learn in a decade or two. So it sounds to me like a new iron curtain, leaving both sides poorer and the people caught in the middle suffering from the separation. (And good luck fighting global warming.)

The majority of the US and Soviet population was better off with the iron curtain than without in real terms. The US median hourly wage only surpassed that of 1968 in the last 3 years.