The author argues that insurgency is mutating in response to changes in the global security environment, thus making much of U.S. strategy and doctrine obsolete. Even though counterinsurgency is not currently a high priority in U.S. national security policy, the military must keep abreast of such changes and preserve some expertise so that American capability could be reconstituted should policymakers again opt for active counterinsurgency support. He states that if the military ignores global developments in insurgency and counterinsurgency, the reconstitution of capabilities would be more difficult.