"The Sept. 11, 2001 attacks transformed global politics as Western democracies abandoned many liberal principles and older conflicts over empire, decolonization, immigration and culture resurfaced in the far-right movements," writes Faisal Devji.

The September 11, 2001 attacks changed a lot for the world. But most importantly, it changed the way the United States was perceived in the world. | World News

Anne-Marie Slaughter explains how the terrorist attacks reshaped American politics and foreign policy.