Did “the world” change after 9/11? Perhaps yes, perhaps no:
Why 9/11 Changed [Everything] Nothing
From Religion Dispatches
The cliché that 9/11 “changed everything” is nowhere less true than in the post-9/11 impulse to declare war immediately. War was a choice as well as an echo: a choice Americans made, and an echo of how Americans have made decisions in times of previous conflict. In that sense, 9/11 changed nothing. That’s because, to paraphrase Pulitzer Prize-winning author Chris Hedges: war is a force that gives Americans meaning through their history, largely because powerful impulses in American religion have historically sacralized war’s religious, redemptive force.