Following World War II, the ongoing process of globalisation led to a proliferation of international conflicts and disputes, prompting an increase in the application and regulation of international law. International law, as a legally binding framework for the rights and responsibilities of sovereign states and other entities with international status, has been crucial in reducing global strife, maintaining peace and promoting cooperation. The post-Cold War era coincided with the rise of constructivist theory, which offers a sociological perspective on world politics, emphasising social normative structures over economic material ones. This perspective underscores the influential role of ideas, norms, and culture in shaping state behaviour constructively. Theoretically, constructivist theories within international relations elucidate the legal function of international law while bolstering its authority and status; thereby further explaining its significance within global affairs. The research encompasses three main components: First, an exploration of the theoretical underpinnings of international law and an analysis of constructivism within the field of international relations will be presented. Secondly, a detailed examination of specific operational mechanisms in modern international relations and their contribution to establishing an orderly framework will be undertaken; and thirdly case analysis to examine how these mechanisms have influenced specific events thus revealing their practical impact. Ultimately concluding that as a normative institutional construct, international law has significantly contributed towards rule-making processes conflict resolution efforts as well as maintaining order within global relations while also highlighting that its construction is an ongoing evolutionary process necessitating continual adjustment within the broader context.