On September 12, 2001, Jean-Marie Colombani, the editor of Le Monde, famously wrote, �Today we are all Americans.� Three years on, it seems that we are all anti-Americans. Hostility to the United States is deeper and broader than at any point in the last 50 years. The Western Europeans, it is often argued, oppose U.S. foreign policy because peace and prosperity have made them soft. But the United States faces almost identical levels of anti-Americanism in Turkey, India, and Pakistan, none of which are rich, postmodern, or pacifist. With the exception of Israel and Britain, no country today has a durable pro-American majority.

In this post-ideological age, anti-Americanism fills the void left by defunct belief systems. It has become a powerful trend in international politics today�and perhaps the most dangerous. U.S. hegemony has its problems, but a world that reacts instinctively against the United States will be less peaceful, less cooperative, less prosperous, less open, and less stable.

The wave of anti-Americanism is, of course, partly a product of the current Bush administration�s policies and, as important, its style. Support for the United States has dropped dramatically since Bush rode into town. In 2000, for example, 75 percent of Indonesians identified themselves as pro-American. Today, more than 80 percent are hostile to Uncle Sam. When asked why they dislike the United States, people in other countries consistently cite Bush and his policies. But the very depth and breadth of this phenomenon suggest that it is bigger than Bush. The term �hyperpower,� after all, was coined by the French foreign minister to describe Bill Clinton�s America, not George W. Bush�s.

Anti-Americanism�s ascendance also owes something to the geometry of...