The monograph is devoted to a topic little studied in the domestic scientific literature - the modern theory of just war. The author focuses on the just war concepts of M. Walzer, N. Foushin, B. Orend and J. McMahan. The work examines in detail the specifics of the interpretation of the just war theory of each of these authors, identifies the theoretical foundations of their concepts and determines the key directions for the development of the just war theory in the 21st century. In addition, the book examines the history of the formation of just war theory. The work is interdisciplinary in nature and is addressed to a wide range of readers - philosophers, historians, specialists in international relations and international law, as well as anyone interested in the problems of the philosophy of war, ethics and political philosophy.< /p>