It is now almost a decade since Reform and Resistance in the International Order first appeared. My continuing conviction that students of international relations benefit from exposure to the theoretical and historical aspects of the subject, as well as the positive reception accorded the original, encourage me to produce a revised edition. In this, while the overall structure remains similar, completely new chapters have been added, both on international/world order issues and on an introductory survey of change in the international system between 1815 and 1990. The opportunity has been taken to rewrite large sections of the original, essentially to take account of new literature in the field and also to accommodate the twists and turns of superpower relations since the 1970s. My greatest debt remains to the many students I have been privileged to teach over the past fifteen years, most recently to the graduate members of the M. Phil in International Relations course of the University of Cambridge.