Hans J. Morgenthau

A leading twentieth-century figure in the study of international politics, this author made landmark contributions to international relations theory and the study of international law. His influential work, first published in the mid-20th century, served for decades as a primary textbook in U.S. universities. Beyond academia, he also wrote extensively for general-circulation publications, offering commentary on international politics and U.S. foreign policy. While occasionally consulting on U.S. foreign policy, he primarily acted as a significant academic critic throughout his career.