I don't have the time to write a lenghty overview right now, but I am all in favor of the UN. It's a forum for international diplomacy and relations to allow states and organizations to coexist, deal with issues and seek to improve themselves. It plays a vital role in peacekeeping, providing humanitarian aid when needed and observing the state of human rights. And, perhaps most importantly, they are the most prominent organisation in the field of international treaties which obviously are of great importance. That being said, they are not without flaws. The vetos in the UNSC, issues with funding, corruption and the incompentence of some organs are all major issues that could be dealt with a lot better.