George Bush's "Axis of Evil" was the expression of a new rhetoric of morality in world affairs, mirroring the ideology of the president and his neoconservative policy advisors. In its fight against evil, the U.S. has economically and politically broken the Soviet Union, waged war against Afghanistan, toppled the Taliban regime, confronted Al-Qaeda, and threatened Syria, Iran, and Northern Korea. But what is this notion of "evil," which has become...