"This fascinating book tells us a lot about the future. It expands our understanding of the interaction of regions in a global system. Peter J. Katzenstein is one of the few scholars in the world with the ability to compare Europe and Asia in the framework of U.S. power. A World of Regions draws on his considerable skills to examine culture and institutions, military power and domestic political processes. This is a big contribution."—Peter Gourevitch, University of California, San Diego "In A World of Regions, Peter J. Katzenstein persuasively argues that 'porous regions,' historically distinctive yet open to transnational influences and embedded in an American imperium, are critical elements in the dynamics of contemporary world politics."—Robert O. Keohane, Professor of International Affairs, Woodrow Wilson School of Public and International Affairs, Princeton University "In its breadth, erudition, and insightfulness this is a truly monumental work in political science (not merely international relations). Peter J. Katzenstein's carefully crafted comparative framework builds on the experiences of Germany and Japan—in Western Europe and Asia respectively—to establish that regional institutions have important effects, above and beyond the effects of globalization and internationalization. Katzenstein's favored explanation is that formal—Weberian—domestic arrangements in Germany versus informal ones in Japan shape regional politics in their respective images. The evidence for the workings of Japanese and German capitalism and culture in their respective regions is robust, convincing, comprehensive, and skillfully deployed."—Etel Solingen, University of California, Irvine