The disciplines of international law and international relations are inextricably linked. Both are concerned with the activities of states and with predicting how states behave and on what basis.For the international lawyer, however, the key concern is the role of the law. On the other hand, political scientists have traditionally regarded international law with skepticism, if not contempt. In recent years new approaches in both disciplines have seen moves towards greater interdisciplinary collaboration. Indeed, at the start of the twenty-first century, theorists from both disciplines are...