As the crisis with Iraq continues, Americans have questions. Is war really necessary? What can it accomplish? What broad vision of U.S. foreign policy underlies the determination to remove Saddam Hussein? What were the failures of the last couple of decades that brought us to a showdown with a dictator developing weapons of mass destruction? What is the relationship between war with Iraq and the events of 9/11? The answers to these questions are found in this timely book by two of America's leading foreign policy thinkers. Kristol and Kaplan lay out a detailed rationale for action against Iraq. But to understand why we must fight Saddam, the authors assert, it is necessary to go beyond the details of his weapons of mass destruction, his past genocidal actions against Iran and his own people, and the U.N. resolutions he has ignored. The explanation begins with how the dominant policy ideas of the last decade—Clintonian liberalism and Republican realpolitik—led American policymakers to turn a blind eye to the threat Iraq has posed for well over a decade. As Kristol and Kaplan make clear, the war over Iraq is in large part a war of competing ideas about America's role in the world. The authors provide the first comprehensive explanation of the strategy of “preemption" guiding the Bush Administration in dealing with this crisis. They show that American foreign policy for the 21st century is being forged in the crucible of our response to Saddam. The war over Iraq will presumably be the end of Saddam Hussein. But it will be the beginning of a new era in American foreign policy. William Kristol and Lawrence Kaplan are indispensable guides to the era that lies ahead.