Emma Ashford, a senior fellow in the Reimagining U.S. Grand Strategy program at the Stimson Center, is the author of First Among Equals: U.S. Foreign Policy in a Multipolar World.
9/11 Turbocharged America's Worst Foreign Policy Impulses—but Didn't Change Its Direction
The United States' shift toward aggressive interventionism was well underway before the 2001 attacks.
