Human nature constantly seeks to transcend its own limitations. Some of civilization's greatest accomplishments -- one modern example being aerial flight -- have been produced by this effort. Still, each of us realizes our bodies cannot fly unassisted by machines. If we don't recognize this reality, we are likely to wind up committed to the funny farm. Yet when it comes to irrational utopian political ideas, there seems to be no similar awareness of the difference between wishful fantasy and reality. Reading John Kerry's latest critique of our government's Iraq policy demonstrates the imperviousness of such fantasies when confronted with...