The monograph is devoted to the study of the history of international law within the framework of the modern concept of its periodization, which is based on the phenomenon of the Peace of Westphalia in 1648. the First Universal Rule of Law . The division of the chronology of the periodization of the history of international law into two global epochs: local (regional) international law and universal international law International legal features of universal legal order are shown on the basis of the Main Act of the Congress of Vienna of 1815 . Charter of the League of Nations 1919 . Charter of the United Nations. The process of formation and development of the science of international law in the conditions of one or another universal legal order is highlighted. The book contains extensive bibliographic material and is designed for researchers, teachers, graduate students, students, anyone interested in the problems of international law, especially its history.