With hindsight, we may see 2006 as the end of Pax Americana. Ever since World War II, the United States has used its military and economic superiority to promote a stable world order that has, on the whole, kept the peace and spread prosperity. But the United States increasingly lacks both the power and the will to play this role. It isn’t just Iraq, though Iraq has been profoundly destabilizing and demoralizing. Many other factors erode U.S. power: China’s rise; probable nuclear proliferation; shrinking support for open trade; higher spending for Social Security and Medicare that squeezes the military, and the weakness of traditional U.S. allies, Europe and Japan. By objective measures, Pax Americana’s legacy is enormous. Since Hiroshima and Nagasaki, no nuclear device has been used in anger. In World War II, an estimated 60 million people died. Only four subsequent conflicts have had more than a million deaths (the Congo civil war, 3 million; Vietnam, 1.9 million; Korea, 1.3 million; China’s civil war, 1.2 million), reports the Center for International Development and Conflict Management at the University of Maryland. Under the U.S. military umbrella, democracy flourished in Western Europe and Japan. It later spread to South Korea, […]