This is a tangent of that but I thought superposition was the state. The state of being some amount of many states at once. It isn’t positive and negative at the same time but some amount of positive and some amount of negative for some period of time. It’s still one state that is just somewhere between a number of states.
I don’t disagree with your criticisms of the UN. They’re not a perfect organization, and UN membership shouldn’t be some standard of sovereignty. However, diplomats have always been able to talk whenever they want, the problem that the League of Nations and then the UN tried to address was all the backrooms conversations nations used to have that were part of the causes that lead up to the first world war. Having an international platform every nation needs to at least listen to is better than the alternative. Arguably, untill now the UN has succeeded, there hasn’t been a WWIII.