The fourth edition surpasses virtually all other introductory texts on the subject, Its extraordinary collection of essays, by some of the most knowledgable scholars of International Relations theory today, clearly shows why theory matters for understanding the world, and why theoretical diversity is an asset rather than a liability * Emanuel Adler, University of Toronto *<br />There can be no better place to start for any student of International Relations than here. This remains the gold-standard textbook on IR theory, packed to bursting with knowledge, insight and fresh perspectives from a group of the most renowned scholars in IR. As an introduction to the endlessly fascinating world of IR theory it can't be beaten * Professor Nicola Phillips, The University of Sheffield *<br />Review from previous edition The best single volume comprehensive introduction to international relations theories that is striking as much for its clarity as for its sophistication. * Amitav Acharya, American University, USA *<br />Top quality contributors provide diverse, accessible and comprehensive coverage across the spectrum of theoretical perspectives and debates, and make this an invaluable resource for students and teachers alike. * Cynthia Enloe, Clark University, USA *