Iraq as a nation sits on a razor’s edge. On one side is a reasonably stable society, with power sharing among its people and a better future for all Iraqis. On the other side is a major sectarian war, ethnic cleansing in the many mixed communities in Iraq, with possible dissolution as a state or a return to totalitarian regime. And, as much as we opposed the war, now the one thing preventing Iraq from falling on the wrong side of that line is U.S. and coalition troops, and newly deploying Iraqi police and military units.