LET ME TELL YOU why military engagement with Saddam Hussein’s regime in Baghdad is not only necessary and inevitable, but good. When the United States finally goes to war again in the Persian Gulf, it will not constitute a settling of old scores, or just an enforced disarmament of illegal weapons, or a distraction in the war on terror. Our next war in the Gulf will mark a historical tipping point—the moment when Washington takes real ownership of strategic security in the age of globalization. That is why the public debate about this war has been so important: It forces...