Someone once said that countries don't start wars that they expect to lose. So the critical element in getting the Chinese into a major war will be an enabling America's retreat from the world stage. "I don't want to have to get involved" was likely a major spur to WW II, and will likely repeat in East Asia. Taiwan is probably toast -- the US won't defend them beyond some Tut-tut resolutions in the United Nations. So emboldened, China will likely see to the consolidation of the Korean peninsula, next. And then Japan. Whether we get WW III probably depends on whether China takes Hawaii by military force or in exchange for all that debt we owe them.
But there is little question that the lights are going out -- again.