Cohen shows how recent changes in the geography of money challenge state sovereignty. He examines the role of money and the scope of cross-border currency competition in today's world. Drawing on new work in geography and network theory to explain the new spatial organization of monetary relations, Cohen suggests that international relations, political as well as economic, are being dramatically reshaped by the increasing interpenetration of national monetary spaces. This process, he explains, generates tensions and insecurities as well as opportunities for cooperation.