They say everything changed on 9/11. No one can dispute that. But we didn't learn anything.
Like other events that forced Americans to reassess their national priorities (the Great Depression, Pearl Harbor, Sputnik) the attacks on New York and Washington were a traumatic, teachable moment.
The collective attention of the nation was finally focused upon problems that had gone neglected for many years. 9/11 was a chance to get smart—but we blew it.
First and foremost the attacks gave the United States a rare opportunity to reset its international reputation. Even countries known for anti-Americanism offered their support. "We are all Americans," ran the headline of the French newspaper.
The century of U.S. foreign policy that led to 9/11—supporting dictators, crushing democratic movements, spreading gangster capitalism at the point of a thousand nukes—should and could have been put on hold and reassessed in the wake of 9/11.