Fully updated with contemporary case examples, this introductory bestselling textbook offers a wide-ranging and approachable guide to international relations. Written by three acclaimed scholars bringing together decades of experience, it introduces key concepts and theories in international relations while equipping you with the analytical frameworks and empirical evidence to examine changes in world politics and the international economy. Supported by a range of popular boxed features such as Levels of Analysis, Differing Theoretical Approaches, Making Connections and Research Insight to help you navigate the complex problems and events in our rapidly changing world. New to the fourth edition: - Updated coverage and discussion of recent developments in international affairs including the war in Ukraine, Israel-Hamas wars, the role of AI in international politics, cryptocurrencies and the rise of the Global South - Analysis of the resurgence of economic nationalism - Brand new case studies featuring contemporary examples such as the enlargement of BRICs, China's increased dominance in the world economy and the use of AI and drone technology in recent conflicts A rich companion website with study guides, instructor resources and interactive exercises has been updated for this edition and is available at no extra cost. “A masterful balance of content and pedagogy.” ― Kanishkan Sathasivam, Salem State University, USA “A great introduction to the discipline of international relations; comprehensively approaching every angle of the field: history, theory, foreign policy analysis, global institutions of law, politics, and economics, security, as well as addressing the future global challenges in an accessible but academically rigorous format for students.” ― Christopher R. Cook, University of Pittsburgh at Johnstown, USA “A superb pedagogical resource for undergraduate students and teachers of International Relations. Wide-ranging in its approach and coverage, it not only engages with the enduring questions that frame the subject matter but shows why those questions are of such fundamental importance.” ― Rosemary Foot, University of Oxford, UK “The 'must read' textbook authored by three top experts in International Relations.” ― Atsushi Tago, Waseda University, Japan Joseph Grieco is Professor Emeritus of Political Science at Duke University, USA. G. John Ikenberry is Albert G. Milbank Professor of Politics and International Affairs at Princeton University. He is one of the world's foremost experts on the liberal international order. He is the author of seven books, including Liberal Leviathan: The Origins, Crisis, and Transformation of the American System (Princeton, 2011) and After Victory: Institutions, Strategic Restraint, and the Rebuilding of Order after Major Wars (Princeton, 2001). Ikenberry is also Global Eminence Scholar at Kyung Hee University, Seoul, South Korea. Michael Mastanduno is Nelson A. Rockefeller Professor of Government and from 2010 through 2017 was Dean of the Faculty of Arts and Sciences at Dartmouth College, USA.