The UN is a toothless tiger - it passes resolutions and treaties that only have as much force as the member states will accede to. In times of war the UN would merely observe for incidences of human rights abuse and attempt to negotiate with involved parties for resolutions of peace - which are irrelevant if they are not adhered to.
Check out this info about its peace keeping role:
http://www.un.org/geninfo/ir/ch5/ch5.htm
It cannot but be supportive, socialist, communist or whatever you want to call it. Does nature, and the human species with it, have much time left to survive in the absence of such change? Very little time. Who will be the builders of that new world? The