Andrew Bacevich, a former lieutenant colonel in the United States army and self-avowed conservative, has emerged in recent years as one of the most incisive and far-reaching critics of American foreign policy and of the Bush administration. His two previous books, American Empire: The Realities and Consequences of U.S. Diplomacy (2004) and The New American Militarism: How Americans Are Seduced by War (2006), argued that the Bush administration has followed a path laid down by earlier administrations. In short, it is not an aberration. In his latest book, The Limits of Power, Bacevich not only holds little hope of foreign policy change from a McCain or Obama administration but also questions whether either would have any intention of changing the broad direction of American foreign policy. In an interview that I conducted with Bacevich recently in Boston, he described Barack Obama’s foreign policy as ‘thoroughly conventional’, a description certainly not meant as a compliment.