I have long advocated a replacement for the UN, mostly because it is so riddled with anti-Semitic hate it warrants the title 4th Reich.
Now I am tempering my position because (1) I've seen some compromise in the discussion of Durban II. South Africa is no longer being considered as a site, because the Islamic hate nations realized no decent nations would attend to give the Islamic hatred credibility if the conference were a perfect repeat of Durban I. In other words, the monsters need the credibility the UN offers and can, in some occasional cases, withhold.
(2) The emergence of the coalition of market-tolerant-tyrannies (China and Russia) and their desire to promulgate their new found ideology of pro-tyranny warrants a forum where free market nations can confront the tyrannies.