According to a University of Chicago study,
http://www.nationalreview.com/nrof_b...lett040203.asp
the cost of not going to war to the U.S. and Iraq far exceed the cost of the war. If the current political situation was allowed to continue the cost to just the U.S. alone for it's containment policies would easily eclipse what the war cost today. It is estimated that the Baath Party would kill another 200,000 Iraqis on top of the 500,000 they have already killed. It seems so much better to deal with a problem then let it fester.