That sounds like what we have now.
Imagine a U.N. with no U.S. to block China and Russia.
If the U.N. could be dissolved, that would be the best course. The result would be international anarchy for a short time while new alliance organizations are formed, but it would be a far more honest system than the current U.N.
But allowing the U.N. to remain as an organization without U.S. involvement would be a veritable recipe for disaster. Either dissolve it, or keep it close so we can breathe flames down its neck.
I think its the third world that is leading the UN no. I havent heard the UN attack China for harvesting organs. They get all excited by Gitmo, but they dont askN. Korea how many they have locked in Gulags. They are useless as tits on a boar hog.