As the 10th anniversary of 9/11 approaches, something unexpected has happened: the ideology that 9/11 made famous—neoconservatism—has died. The evidence is all around us. In Pakistan, the Obama administration has just executed Al Qaeda's second in command, Atiyah Abd al-Rahman, dealing another blow to a network whose defeat, according to Defense Secretary Leon Panetta, is now "within reach." Post-9/11, neoconservatism posited that jihadist terrorism was the greatest foreign-policy threat of our age, a threat on par with Nazi Germany and the Soviet Union.