Modern International Law in the Light of US Unilateralism

Great powers in the field of the international system have many capabilities in various fields, which has placed them in a privileged position to operate in various international fields. International law, as a set of rules governing the relations of international actors, has been influenced by the actions and procedures of great powers in different periods. In the modern era, which includes the period after 1945, great powers, especially the American hegemony, in addition to the development of traditional international law, have shaped new legal rules. In addition to the cooperation and competition of great powers, their unilateralism can also have many effects on international law. The purpose is to investigate the results and consequences of the American unilateralism on international law. the question is, what effect has American unilateralism in the field of international relations had on international law. this hypothesis is proposed that due to the high capacity and ability of hegemony in the field of international relations, In the field of international law although the unilateralist action of this country can lead to the creation of international custom in some cases, it actually causes weakness and functional crisis in this field. The present study examines US unilateralism in the field of international law in three areas: the creation of international custom, the cross-border implications of domestic law, and the interpretation of the rules of international law by this country. The method of the current research is descriptive-analytical and the information was collected in a library manner