Interdisciplinary legal research is often propounded to effectively address legal challenges in diverse fields of law. The wider perception of law as an instrument of social change naturally makes the method of socio-legal research a much desirable tool. But the utility of this method has been limited in inquiries of international law. It is the fundamental nature of the international, which alienates the relevance of socio-legal research. Modern international law is heavily influenced by the Westphalian system of states based on the principles of sovereignty, making it more of a state and less of a sociologically oriented system. Although this characterization is challenged by revisionists and international relations theorists, international legal system predominantly reveals the traits of sovereignty. The primacy of states as subjects of international law, as distinct from municipal laws governing natural and legal persons raise concerns regarding sociological inquiries of the former. Profound legal philosopher of sociological jurisprudence, Julius Stone has exposed the constraints of such inquiries of international law around the middle of the last century in his famous Recueil of the Hague Academy of International Law. However, since then there is a revival of interest in investigating the sociological foundations of international law given its fast changing landscape. In such a context, it is necessary to reexamine the major constraints of sociological enquiries identified by Julius Stone in order to ascertain whether they continue to pose challenges. In spite of constraints identified by Julius Stone, several scholars including Stone himself had propounded theories and visions for an increased sociological orientation of international law. The present paper not only intends to examine some of the major constraints of sociological enquiries identified by Stone but also equally aims at analyzing his evaluation of major theories and suggestions propounded by scholars in overcoming the constraints. © Common Ground.