Andrew Bacevich is professor of history and international relations emeritus at Boston University. A graduate of the U. S. Military Academy, he served for twenty-three years as a commissioned officer in the United States Army. He received his Ph.D. in American diplomatic history from Princeton. He is the author of the forthcoming book After the Apocalypse: America's Role in a World Transformed. Earlier books include The Age of Illusions: How America Squandered Its Cold War Victory;Twilight of the American Century; and America's War for the Greater Middle East: A Military History.