Since the end of the U.S.-Soviet Cold War, there has been growing discussion of the possibility that technological advances in the means of combat would produce ftmdamental changes in how future wars will be fought. A number of observers have suggested that the nature of war itself would be transformed. Some proponents of this view have gone so far as to predict that these changes would include great reductions in, if not the outright elimination of, the various impediments to timely and effective action in war for which the Prussian theorist and soldier Carl von Clausewitz (1780-1831) introduced the term "friction." Friction in war, of course, has a long historical lineage. It predates Clausewitz by centuries and has remained a stubbornly recurring factor in combat outcomes right down to the 1991 Gulf War. In looking to the future, a seminal question is whether Clausewitzian friction would succumb to the changes in leading-edge warfare that may lie ahead, or whether such impediments reflect more enduring aspects of war that technology can but marginally affect. It is this question that the present essay will examine.