The purpose of this article is to provide a clear definition of public international law by looking at its primary and secondary sources and emphasizing its primary nature and importance for maintaining the balance in maintaining a state of international peace and good will. The endeavor to define public international law is the goal towards which various attempts will be made. As a result, this article is an attempt to take a critical look at public international law, as well as to examine the relationship between public international law and domestic law. This article will also examine various theories explaining the relationship between public international law and domestic law, while attempting to establish how international law derives its superiority over domestic law. Establishing why international law is superior to domestic law, recalling that public international law is created for sovereign states or recognized political entities, the articles sought to define the basic mechanism on which international law was based, so that states could and continues to participate internationally.