Baradiel said:
My point is, without any sort of power, the UN would be more useless than it is now. China and Russia, as the other two members of the Security Council, could have vetoed any action in Libya. To get to that stage, there has to be a vote in the United Nations involving every nation state.
Basically, it is the United Nations reason to exist, and joining the United Nations subscribes your country to their Charter.
The legal foundation of this operation highly debatable. The installation of a No-Flight zone interferes with the sovereignty of a state. The No-Flight zone is an armed enforcement of peace regarding the UN Charta. This a protection responsibility which the UN
claims to have but this is controversial according to international law (there was a statement of the UN Security Council regarding this concept, which was debated by several experts in international law these days)
The problem here is that the armed assault on Lybia's people wasn't enough of a reason for intervention; this is by no means the level of a full blown Genocide (Ruanda and the likes)
It's a sad truth that assaults of this level are pretty common, it's just that this conflict is very media-driven atm...
There is also the fact that Lybia wasn't threatening the international peace which would be the case if it attacks neighbors or the neighboring countries would start to militarily intervene in this conflict.