David Mltrany's functionalism has provided an inspired, if widely criticized approach to the study of international organization,1 Although originally conceived without regional restrictions in its application, it has been interpreted as a prescription for European integration hence the development of the formerly pervasive but now largely discredited neo-functionalist school.2 The contention that will be advanced here is that Mitrany's work may still usefully guide our analysis of international organization. This is especially so with regard to understanding the stubbornness of sovereignty, and the complexity of decision making in a new generation of multilateral conference diplomacy, as typified by UNCLOS and UNCTAD. These forums are likely to feature more prominently in coming attempts to develop codes and rules of conduct in fields of global conflict and co-operation such as technology transfer, economic development, basic health and other ‘common heritage’ resource management issues. The grounds for promoting Mitrany's approach are that a close reading of his principal works reveals a more subtle, conservative and realistic appreciation of sovereignty than many critics have permitted, and furthermore, within this more cautious appraisal there lie a number of procedural pointers to the constructive, if undemonstrative circumvention of the restriction of sovereignty.