This book could not have been possible without the help of many friends, colleagues, and institutions. I am grateful to the members of my dissertation committee at Columbia University, who supported this work in its first iteration, in particular, Professors Robert Jervis and James Morley. The initial idea for the book grew out of a graduate colloquium on Japanese Foreign Policy and an international relations theory course with these professors. They subsequently worked with me on this project throughout my time at Columbia and after. Their conscientiousness in reading countless drafts despite their busy schedules, their incisive comments, and their guidance and friendship have been invaluable. Simply put, one could not have asked for two finer scholars and gentlemen as teachers and mentors.
Other faculty at Columbia University and tutors at Hertford College, Oxford University, offered well-taken advice along the way. At Oxford Jeff Holzgrefe allowed me to explore my first interest in international security and Korea. At Columbia, Professors Jack Snyder and Andrew Nathan instilled in me an understanding of the importance of methodological rigor and rich case study research in any scholarly endeavor. Professor Gerald Curtis's crisp lectures and insightful writings sparked my interest in the United States-Japan alliance. Amy Lee at Columbia's East Asian Library deserves thanks for procuring numerous sources, as does Gari Ledyard for sharing his many historical insights. I have benefited immeasurably from the constructive criticism of my peers on the ninth floor ("The Friday Group"). I owe special thanks to Carol Y. S. Schulz of the Korean department for her infinite patience in teaching me a language that I often found impossible to learn, and to Peggy Freund for guiding me through the administrative maze of my graduate school years.
A variety of generous institutions have been behind this project. The