Andrew J. Bacevich, a professor of history and international relations at Boston University, served for twenty-three years as an officer in the U.S. Army. He is the author of "Washington Rules", "The Limits of Power", and "The New American Militarism", among other books. His writing has appeared in "Foreign Affairs", "The Atlantic Monthly", "Harper s", "The Nation", "The New York Times", "The Washington Post", and "The Wall Street Journal".