The idea for this volume grew out of a previous collaboration between Jeffrey McCausland and Douglas Stuart. Arguing that the bilateral relationship between the United States and the United Kingdom was both underappreciated and understudied, they organized a series of conferences in 2005 which brought together a group of well-known American and British academics, journalists, and policymakers to discuss political, military, and economic aspects of the "special relationship." The conference proceedings, published by the Strategic Studies Institute of the U.S. Army War College under the title U.S.-UK Relations at the Start of the 21st Century, proved to be extremely popular- requiring a second printing and generating followon public discussions on both sides of the Atlantic.1 Conversation during these public events tended to focus on one basic question and a couple of ancillary questions: Was the U.S.-UK relationship unique? If so, in what respects? And why?