Some points regarding the UN:
1. It has no effective power to enforce anything.
a. It has no money of its own. The members make voluntary donations.
b. It has no army. Members volunteer troops for "peace keeping" duty. Blue Helmets are just spectators everywhere they are placed. The only exception is in Korea which is an accident of history. But, Blue Helmet duty is VERY popular with soldiers everywhere because the UN supplementary pay is JUST WONDERFUL. (as is UN civilian pay).
2. The UN pretends that its "Resolutions" are something like laws. They are not. These multitudinous documents are useful to the major powers (US, Russia, China, India maybe) when they want to justify some action they wish to take. The various "Resolutions" on Iraq that the US managed to wheedle out of the Security Council come to mind. And, the "Resolutions" are oh, so useful as rhetorical devices with which to denounce your long-standing enemies. The Muslim/Arab states and the Israelis are particularly good at this.
3. The real value of the UN lies in its role as a coordinating body for its subordinate specialized agencies; IAEA, UNHCR, ICAO, etc. But, in fact, some of them are of no real value, and exist largely to line the pockets of their staff.
4. The international courts and investigations run by the UN are a joke. They have no power whatever against the aforementioned major powers. War crimes trials? Yes, the losers get tried after denunciation by the winners. Once again, the lawyers, investigators etc., live well in the process. The farcical UN investigation into the murder of Rafiq Hariri is a wonderful example. It went on forever and guess what! Hizballah done it! (probably with a wink and a nod from the Assad) Who woulda thought? An effort was made in the midst of the investigation to get me to participate. The pitch was made by a sometimes famous ex-CIA pundit guy who said that my intimate knowledge of the low personalities among the Lebanese Shia and Hizballah would be the key to making the case for their guilt. Then, the next day the chief UN investigator called to make the same appeal with a lot of money attached to it. But, alas, I slithered away without taking the bait.
Perhaps we should bring back the League of Nations. They also were useless and they have all those empty marble palaces in Geneva. Maybe with Bill De Blasio in charge the UN might wish to leave New York City. pl