Where is the Moral outrage of the United States?
These people are being exterminated by thugs and criminals. An arab minority that runs roughshod over the country and allows paramilitary
militias/lynchmobs to displace, rape, and commit mass murder amoung the native black population. Its revolting.
The UN stalls on it, because to call it genocide would require a certian class of action. The EU is incapable of doing it, and the only nations that
are capable in the world don't want to do anything. America is the most powerful, america is the most capable, it
must do something. Forget
the somalia episode, or at least rember that the ideals and involvment there were just and that the men who died died honourably and for a grand
cause.

Why has the UN failed to take the lead in this?

Because its irrelevant, weak, indecisve, and corrupted by the influences of countries that aid and abet these atrocities in and around darfur.