Why do we try to use military force to solve our political problems? And why, when our forces win the military battles does this still fail to solve those problems? It is because the force lacks utility. From Iraq to the Balkans, and from Afghanistan to Chechneya, over the past fifteen years there has been a steady stream of military interventions that have not delivered on their promise for peace, or even political resolution. The Utility of Force explains this anomaly at the heart of our current international system.