Interesting that the other response to my post (thus far) essentially argues for the opposite. That a re-emphasis on local politics would be preferable.
Personally, I think letting people go there own way as much as possible is the best course, and empowering the United Nations is pretty much the opposite of that. I'm not saying there isn't a lot of good stuff in the Declaration of Human Rights, but to have a super-ordinate body that is in no way directly accountable to the people over whom it rules, and which attempts to reconcile increasingly disparate cultures, will result in authoritarianism and war.