How does one pressure the new world power once that nation takes control? China will never have to cooperate because they either stay second rate (and we won't invade) or they supplant the west (and we won't invade).

You're a zealot. If I'm not saying anything values then stop tagging me. I know I can't convince you you're wrong, because you fully believe the world will end soon. I've heard them say the world is ending soon for thirty years. The only thing that changes is the reason and the date... but no missed dates ever force an admission that things aren't as dire as claimed. The warnings just get more dire and the demands get more extreme.