Iraqi security forces in Karbala, unable to control violence between the Badr brigades and the Madhi army, ordered one million pilgrims to leave the city. If you thought a Sunni/Shiite civil war was the end game or a grand coalition that enforces a soft partition is the answer, think again.
NOTE: As I point out in Brave New War: in a post-state global system, newly emergent loyalties (to groups other than the state) don't cling to simple formulas of religion or ethnicity. Instead, it's a race to the bottom to find the most successful unit that meets the needs of the participants. Richard Feynman's famous quip, "there is plenty of room at the bottom," is in reference to the potential of nanotechnology. The same could be said about is the size of a group that represents an autonomous unit -- in that it can defend its interests -- in the globalized environment. We haven't found the bottom yet.