The UN as Dr Alf says, is not adding proper value but is not in need of replacement. Instead, it needs to be funded properly, not just by the Americans and ourselves (the UK) but by the many other countries, which belong to it but make insufficient or late contributions.
Secondly, it is very good at stating problems, writing voluminous reports about what needs to be done but never taking action on the resolutions it passes or taking so long that situations are overwhelmed by events.
What happened with the Dutch peacekeepers in Bosnia when Vladic killed the innocents during the 1990s during the Yugoslav civil war is an example of the ineffectiveness of the UN and their inability to resource peacekeeping forces with sufficient manpower or firepower.
North Korea is poking its finger in the eyes of the Japanese who they hate with a passion for invading them and savagely mistreating their citizens and the hapless “comfort woman” who were often serviced by Japanese Imperial troops 22 times a day.
The oriental concept of blaming current generations for what is in effect “the sins of their fathers and ancestors” is at play here so someone like the Chinese and the Russians need to be brought into the equation to get a deal done in terms of an uneasy peace and then act as guarantors under the auspices of the UN
Kim Jong Un is a psychopath and a dangerous man but we can understand why he mistrusts the West and is determined to keep nuclear weapons, given the fate of Gaddafi and Saddam Hussein. Like me and countless others, he can read the PNAC website and see that under the Wolfowitz doctrine his country along with Syria, Iran, Russia and China are all targeted for “regime change”. So convincing him otherwise is likely to be hard for any Westerner, even an elder statesman like Jimmy Carter.
He must first be contained then the country needs to be subjected to HAARP triggered earthquakes and flooding and then a long time after that we can eliminate Kim Jong Un using fully cloaked craft and Ironman suited special forces operatives with invisibility shields.