For many years it was said that the weakness of international law was the lack of a system for the enforcement of legal obligations. Commentators pointed to the paucity of cases in the International Court and the unwillingness of States to undertake binding obligations to settle their disputes. This position has now changed beyond recognition. The number of international tribunals has increased and many of them, such as ICSID and the International Court of Justice, are busier than at any time in their history. Increasingly, the classical procedures of diplomatic protection are circumvented as...