WAR, JUSTICE, AND LEGITIMACY: RE-EXAMINING THE ETHICAL AND LEGAL FOUNDATIONS OF INTERNATIONAL ORDER

The pursuit of international order has long been intertwined with questions of war, justice, and legitimacy. While the modern international system is founded upon the principles of sovereign equality, peaceful dispute settlement, and the prohibition of the use of force, armed conflict continues to shape global politics and international relations. The persistence of war despite extensive legal regulation raises a fundamental question: what makes the use of force legitimate within an international order that seeks to preserve peace? Historically, legitimacy in warfare was evaluated primarily through moral and philosophical lenses. Classical thinkers sought to determine whether war could ever be justified and, if so, under what conditions. These ethical inquiries gradually evolved into normative frameworks governing the resort to force, the conduct of hostilities, and the responsibilities that follow armed conflict. In the contemporary era, such questions extend beyond philosophy into the realm of international law, where institutions such as the United Nations (UN) and the International Court of Justice (ICJ) seek to regulate state behaviour and maintain collective security. The relationship between ethics and law remains central to understanding the foundations of international order. Legal rules may prohibit certain forms of conduct, yet the legitimacy of political and military action often depends upon broader considerations of justice, accountability, and moral responsibility. Consequently, international order cannot be understood solely through legal institutions or power politics; it must also be examined through the ethical principles that underpin them. This article examines the ethical and legal foundations of international order through the interconnected concepts of war, justice, and legitimacy. It traces the evolution of these ideas from the writings of Saint Augustine and the Indian doctrine of Dharma Yuddha to the contemporary framework of international law, the United Nations system, and the jurisprudence of the International Court of Justice. In doing so, it argues that the legitimacy of international order derives not merely from legal authority but from the continued interaction between ethical principles and legal norms.