If war comes even despite the historic, tenacious, and comprehensive opposition now raging across the planet, the U.S. government will proclaim triumphantly that everyone who isn’t a traitor needs to rally around Washington to “support our troops.” Opponents of the war could opt for many possible replies. We could point out that our troops in Iraq are barely in danger at all because they are assaulting a tenth-rate opponent that has no serious means to defend Iraq much less to attack the world’s sole superpower. We could point out that while perhaps a few hundred U.S. troops will die in...