I'm not sure if I'm misunderstanding you or if you're misunderstanding the UN.
The Security Council does not reflect a broad geographical constituency. There are no representatives from South America or Africa, only one country from the Western Hemisphere, and 3 are from Europe (if you count Russia as a European nation).It seems like you're talking about the SC
permanent members, the big 5 nuclear powers. The SC as a whole has members from all over the globe at one point or another; they rotate through. Here are the current members:
http://www.un.org/Docs/sc/unsc_members.htmlIf you want to change the rules for who gets to be a permanent member, what would you change them to? If you want to eliminate permanent members completely - a move that I support in principle - what'll happen is those powerful nations will abandon it. A sad reality, but a reality nonetheless.
Ditto on point 2. I believe only the 5 permanent members have veto power. Again, take that away and they will walk.
On point 3 the problem becomes who decides? We can all agree that there are certain countries with obvious human rights violations - but what about the US death penalty? There are plenty of nations out there that would consider that grounds for keeping the US out of the GA. If that happens, we walk. Yes, it's bizarre to see a country like Iran heading up the disarmament committee (I think it was them), but the reason that happens is because the UN has to be seen as not taking any sides. Would it make more sense for the US to take charge of that committee? Obviously Iran (and probably many Americans) would laugh.
The UN is far from perfect, but it's good enough for now. By keeping the powerful nations in we keep the institution running, and this gives smaller countries a voice (not to mention the wonders the UN has done on development/social issues around the globe). Also, over the long term you're builing norms that people come to accept as a fact of life. What besides a
belief in the UN was reflected in those US polls last winter about the US getting UN support for its war in Iraq? We don't
have to pay attention to the UN on shit, but people have grown accustomed to building consensus on the international stage, and that gives the UN legitimacy. Over time it will also create the right environment for giving the UN more power by giving smaller nations more power, even at the expense of bigger nations. (This is where most people break out with their fears of world government and the rest, but it's really not such a terrible idea. It's not perfect, but nothing is.)
Anyway, the point of this rambling is that I agree that it's not always fair, but it
is practical and even effective, and that counts a lot.
Edited because I switched thoughts mid-sentence, never a good thing...