The textbook is part of the educational-methodical complex on the discipline "Theory of International Relations" (TMO) and includes theoretical research materials intended for study at seminar sessions . They are designed to help students understand the specifics of the formation and development of TMO as a scientific discipline, as well as contribute to the development of the principles of theoretical analysis of international relations. In this edition - the first part of the textbook - the texts of the leading theorists of political realism and neorealism, considered at the seminar sessions on discipline . are collected. The study of the materials presented in the manual allows you to form knowledge about the specific features of theoretical schools, as well as about their problems, conceptual apparatus and system of theoretical constructions. The manual is intended for students of the Institute of International Relations and World History of NSU . N. and . Lobachevsky, students in the direction of training 41. 03. 01 "Foreign Regional Studies" .