The United Nations was founded on this day fifty-nine years ago. Parts of it have received the Nobel Peace Prize eight times over that time though it sadly gets even less respect than Rodney Dangerfield.
I would be hard pressed to name another organization that has done as much demonstrable good for so many people around the world.
Look at the UN website and I guarantee you'll find lots of things that you didn't realize the UN was responsible for-- both in solving huge global problems and in ways that benefit your own daily life.
Take a look and actually speak up when people say manifestly incorrect things about the UN. Yes, it has a lot of flaws but those are nothing in comparison to what good it has done for the world.