We have lost a mentor, collaborator, and friend. Bruce Russett died on September 22, 2023, in Hamden, Connecticut at the age of 88. He was Dean Acheson Professor of International Politics at Yale University, where he was an active faculty member from 1962 to 2009 and where, after his retirement, he held a research professorship. Bruce was one of the leading lights of the scientific turn in international relations scholarship. His body of work, which included some truly pioneering contributions incorporating ideas and approaches from the field of economics, addressed an exceptionally diverse range of substantive, theoretical, methodological, and normative questions. Of these, he is best known to the contemporary discipline for his elaboration and extension of democratic peace theory. His influence on so many aspects of the field was felt in many other ways through his training of graduate students, his service to the profession—for example, as president of both the Peace Science Society (1977-79) and the International Studies Association (1983-84)—and, not least, his editorship of the Journal of Conflict Resolution from 1973 to 2009.
A graduate of Williams College, with a bachelor’s degree in political economy (1956), Bruce Russett received a graduate diploma in economics from King’s College, Cambridge (1957), before attending Yale, where he earned his PhD in political science in 1961. Those early years were formative. His background in economics made him a good fit at Yale, where Robert Dahl and Karl Deutsch were at the forefront of what would become known as the “behavioral revolution” in political science, an effort to apply the scientific method to the study of politics. As his dissertation advisor, Deutsch’s influence on Bruce was profound. His dissertation picked up on themes in Deutsch’s path-breaking work on international integration and security communities, leading to his first book, Community and Contention: Britain and America in the Twentieth Century (MIT Press, 1963).
After serving one year as an instructor at MIT, Bruce returned to Yale in 1962 as an assistant professor of political science. There he remained a member of the faculty for the entirety of his academic career, though he also received a number of visiting appointments, including at Columbia, Michigan, Harvard, Free University of Brussels, Soviet Academy of Sciences, Netherlands Institute of Advanced Study, Tel Aviv University, and the University of Tokyo Law School. Continuing his collaboration with Deutsch at Yale, Bruce directed the World Data Analysis Program, which released the first edition of the World Handbook of Political and Social Indicators in 1964. Along with the Correlates of War Project at Michigan, the program at Yale paved the way for a new generation of scholars engaged in quantitative research in international relations and comparative politics.
A subject that Bruce would return to frequently throughout his career was deterrence. In “The Calculus of Deterrence” (Journal of Conflict Resolution, 1963), he was the first to subject the prevailing rational-choice approaches to a systematic empirical analysis of the conditions contributing to a state’s ability to deter an attack on an ally. Bruce was equally concerned with the ethics of deterrence, especially the central moral quandary of nuclear deterrence: how can we threaten to do something that would be morally unacceptable actually to do? His Catholic faith, scholarship, and ethical concerns came together when he served as principal advisor to the US National Conference of Catholic Bishops, which issued its influential Pastoral Letter on War and Peace in 1983. The Letter boldly challenged the legitimacy of any use of nuclear weapons and raised significant moral questions about nuclear deterrent threats. Coming at a time of heightened cold war tensions and a renewal of the nuclear arms race, the Letter received attention far beyond the confines of the Catholic Church and contributed to the broader public discourse on the dangers of the superpowers’ military postures and policies. Bruce’s concern with the civilian consequences of armed conflict, especially for women and children, also led to pioneering work from the perspective of public health published in the American Political Science Review (2003) and Social Science and Medicine (2004).
Bruce’s work on the Pastoral Letter was not the first time he turned his academic expertise and ethical commitments to a critique of American military policy. In No Clear and Present Danger (Cambridge University Press, 1972), while many scholars were questioning the US war in Vietnam, Bruce dared also to challenge the conventional wisdom that Japan’s attack on Pearl Harbor in 1941 provided an unambiguous and immediate reason for the country to join World War II. Much of the reaction to this book was harsh, and not unexpected, but it showed Bruce’s courage as a scholar. He did not shrink from controversy when he thought our understanding of the world could be advanced by considering unconventional subjects, arguments, and approaches.
Much of Bruce’s scholarship focused on various influences of the domestic environment on the national security policy of the United States, and vice versa, including the award-winning What Price Vigilance? The Burdens of National Defense (Yale University Press, 1970), as well as Military Force and American Society (Harper & Row, 1973), and Controlling the Sword: The Democratic Governance of National Security (Harvard University Press, 1990). Here again, he was a pioneer; this work started appearing when the discipline was still preoccupied with strictly international interactions, like war, arms races, and balances or imbalances of power.
Bruce’s most significant and enduring contribution to the discipline is his work on the “democratic peace” – the theory that democracies rarely resort to war with each other. The theory did not originate with Bruce; it can be traced back to Immanuel Kant’s essay, “Perpetual Peace.” Nor was Bruce the first to subject the notion to empirical testing. But no scholar did more to theorize, test, refine, and extend the democratic peace, or to debate its merits with critics. It became one of the discipline’s most recognizable research programs. Grasping the Democratic Peace (Princeton University Press, 1993) was Bruce’s first comprehensive statement on the subject, and it brought within a single work he had been doing with various colleagues. He continued to advance the research program from there by integrating the pacific effects of economic ties and participation in institutions of global governance, both of which Kant also anticipated. This “Kantian Peace” was the subject of Triangulating Peace: Democracy, Interdependence, and International Organizations (W. W. Norton & Company, 2001). The book won the International Studies Association’s prize for the best book of the decade.
Throughout his career, Bruce Russett published, individually or with co-authors, more than 250 articles and chapters and 28 books, including a textbook, World Politics: The Menu for Choice, which appeared in ten editions. It was one of the first undergraduate textbooks to link theory and research, interweaving concepts across levels of analysis and providing sophisticated introductions to such key concepts as the principal-agent problem, interdependence, collective goods, and tragedy of the commons. Bruce believed that educating undergraduates required not only communicating what we think we know about world politics, but also why we think we know it.
But for all his accomplishments and stature in the discipline, what we have lost most with Bruce’s passing is a remarkable human being. He was unfailingly attentive to his graduate students and his mentorship, for us and others, led to rewarding scholarly collaborations and to valued friendships. But countless other young scholars, who were not his students, benefited from Bruce’s generosity and genuine interest in their ideas, research, and progress. We say goodbye to one of the greats, an inspiration to so many of us. ■
