ANDREW J. BACEVICH, a professor of history and international relations at Boston University, retired from the U.S. Army with the rank of colonel. He is the author of The Limits of Power and The New American Militarism. His writing has appeared in Foreign Affairs, Atlantic Monthly, The Nation, New York Times, Washington Post, and Wall Street Journal. He is the recipient of a Lannan Award and a member of the Council on Foreign Relations.