Modern international law is largely characterized by its specialized regimes. International commercial law, international protection of human rights and international environmental law are only the most important examples of isolated areas in international law and which are characterized by the establishment of a certain hegemony of their rules. This article analyzes the interaction between different regimes and will conclude that current international law lacks the capacities to effectively coordinate these regimes. We will argue that coordination is required between the different dispute settlement mechanisms. An effective coordination between specialized regimes can be carried out through rules such as the forum non conveniens of common law and not, as established by the Vienna Convention on the Law of Treaties, through criteria of temporal sequence.