This collection of essays celebrates more than four decades of international relations research by the distinguished scholar and practitioner Richard H. Ullman. The book demonstrates the dilemma faced by the organizers of a Festschrift for a prolific author with wide-ranging interests: Should the chapters focus on, and collectively do justice to, one topic alone; or should the book take a wide-ranging approach that is more representative of the broad spectrum of subjects analyzed by the honoree? The editors of this volume have some success in following both routes simultaneously, albeit with some necessary trade-offs.