This Oxford Handbook is the definitive volume on the state of international security and the academic field of security studies. It provides a tour of the most innovative and exciting news areas of research as well as major developments in established lines of inquiry. It presents a comprehensive portrait of an exciting field, with a distinctively forward-looking theme, focusing on the question: what does it mean to think about the future of internationalsecurity?The key assumption underpinning this volume is that all scholarly claims about international security, both normative and positive, have implications for the future. By examining international security to extract implications for the future, the volume provides clarity about the real meaning and practical implications for those involved in this field. Yet, contributions to this volume are not exclusively forecasts or prognostications, and the volume reflects the fact that, within the field ofsecurity studies, there are diverse views on how to think about the future. Readers will find in this volume some of the most influential mainstream (positivist) voices in the field of international security as well as some of the best known scholars representing various branches of critical thinkingabout security. The topics covered in the Handbook range from conventional international security themes such as arms control, alliances and Great Power politics, to "new security" issues such as global health, the roles of non-state actors, cyber-security, and the power of visual representations in international security.The Oxford Handbooks of International Relations is a twelve-volume set of reference books offering authoritative and innovative engagements with the principal sub-fields of International Relations.The series as a whole is under the General Editorship of Christian Reus-Smit of the University of Queensland and Duncan Snidal of the University of Oxford, with each volume edited by specialists in the field. The series both surveys the broad terrain of International Relations scholarship and reshapes it, pushing each sub-field in challenging new directions. Following the example of Reus-Smit and Snidal's original Oxford Handbook of International Relations, each volume is organizedaround a strong central thematic by scholars drawn from different perspectives, reading its sub-field in an entirely new way, and pushing scholarship in challenging new directions.

Part I: Introduction; 1 Alexandra Gheciu and William C. Wohlforth: The Future of Security Studies; 2 Keith Krause and Michael C. Williams: Security and 'Security Studies': : Conceptual Evolution and Historical Transformation; 3 Iver Neumann and Ole Jacob Sending: Expertise and Practice: The Evolving Relationship between Study and Practice of Security; Part II: Approaches to International Security; A. Schools of Thought; 4 Laura Sjoberg: Feminist Security and Security Studies; 5 Chris Hendershot and David Mutimer: Critical Security Studies; 6 Adam Quinn: Realisms; 7 Michael Barnett: Constructivisms; 8 John M. Owen IV: Liberal Approaches; 9 Didier Bigo and Emma Mc Cluskey: What is a PARIS Approach to (In)securitisation? Political Anthropological Research for International Sociology; B. Methods: Methodological Implications of Thinking about the Future of International Security from Different Perspectives; 10 Adam Lauretig and Bear Braumoeller: Statistics and International Security; 11 Jeff Checkel: Methods in Constructivist Approaches; 12 Mark Salter and Can Mutlu: Methods in Critical Security Studies; 13 Andrew Kydd: Game Theory and the Future of International Security; 14 Rose McDermott and Peter Hatemi: Biology, Evolution, and International Security; Part III: Major Issues for 21st Century Security; 15 Dale C. Copeland: Systemic Theory and the Future of Great Power War and Peace; 16 Aaron Clauset and Kristian Skrede Gleditsch: Trends in Conflict: What Do We Know and What Can We Know?; 17 Michael Horowitz: Leaders, Leadership, and International Security; 18 Ron Krebs: The Politics of National Security; 19 Dan Philpott: Religion and International Security; 20 Leslie Vinjamuri: The Future of International Security Norms; 21 Jonathan D. Caverley: Economics of War and Peace; 22 Fiona Adamson: The Changing Geography of Global Security; 23 Daniel Deudney: The Great Debate: The Nuclear-Political Question and World Order, 1945-2015; 24 Deborah Avant and Virginia Haufler: Public/Private Interactions and Practices of Security; 25 Etel Solingen: Nuclear Proliferation: the Risks of Prediction; Part IV. Challenges and Opportunities for 21st Century Security; 27 Jennifer Erikson: Arms Control; 28 Brendan O' Leary and Nicholas Sambanis: Nationalism and International Security; 29 Thierry Bros: Energy Security; 30 Audie Klotz: Migration; 31 Jennifer M. Welsh: Humanitarian Intervention; 32 Joshua Busby: Environmental Security; 33 Anja Jakobi: The Crime Scene: What Lessons for International Security?; 34 Audrey Kurth Cronin: Terrorism; 35 Robert Jervis: Intelligence and International Politics; 36 Ronald Deibert: Trajectories for Future Cyber Security Research; 37 Austin Long: Counter-Insurgency; 38 Necla Tschirgi: International Security and Development; 39 Sarah Kreps, Matthew Fuhrmann, and Michael Horowitz: Drone Proliferation in the 21st Century; 40 Lene Hansen: Images and International Security; 41 Sarah Percy: Maritime Security; 42 Sue Peterson: Global Health and Security; Part V: 21st Century International Security Actors; 43 Barry Buzan: Great Powers; 44 Sten Rynning and Olivier Schmitt: Alliances; 45 Ian Hurd: The UN Security Council; 46 Matteo Legrenzi and Fred H. Lawson: Regional Security Complexes and Organizations; 47 Hans Peter Schmitz: International Criminal Accountability and Transnational Advocacy Networks (TANs); 48 Lindsay Cohn, Damon Coletta, and Peter Feaver: Civil-Military Relations