Andrew J. Bacevich is a professor of history and international relations at Boston University. His new book, Washington Rules: America’s Path to Permanent War, has just been published. His other books include, The New American Militarism: How Americans Are Seduced by War, The Limits of Power: The End of American Exceptionalism (American Empire Project), and The Long War: A New History of U.S. National Security Policy Since World War II.