The book "Investigating the nature of peace and the conditions for its eternal preservation" was written by the outstanding American economist and sociologist Torsten Veblen. In this work, the author expresses his important ideas about the nature of peace, international relations and ways to ensure sustainable peace in the modern world. Veblen examines the causes of conflicts, the role of economic and political factors in the formation of interstate relations, and offers his own views on how to achieve eternal peace in the world. This book is of great importance to both economists and political scientists interested in issues of war and peace, and offers readers insight into the nature of world order.