On a hot sabbath, i am prompted to say that Darfur is a catastrophe that could and should be solved in an hour or so. The killers largely operate from helicopters and small fixed wing aircraft. We could destroy them all in an hour or so. But that would be "wrong," because it would violate the current hymnal.
Go tell the victims. Explain why sanctions are better, because it makes the Western politicians feel pious. Even though black Africans are being slaughtered.
And while you're at it, tell the starving people of Zimbabwe why their killer and oppressor, Robert Mugabe, is left untouched by the entire outside world. Explain why St Nelson Mandela doesn't give a damn, while you're at it.
The Middle East is tough. These African horrors are relatively easy to fix. But nobody does a damn thing except talk about sanctions...and then largely fail to enact and/or enforce them.
When did Western leaders become vulgar Marxists? These evils do not have economic causes and are unlikely to be defeated by economic means (remember the Iraqi sanctions?). They have political causes and can be defeated by superior fire power.