Herbert Butterfield: The Historical perspective -- Reinhold Niebuhr: From theology to political prudence -- John Courtney Murray: Christianity and war -- Martin Wight: The Values of western civilization -- E.H. Carr: The Immanence of power as the standard -- Han J. Morgenthau: Principles of political realism -- Nicholas J. Spykman: Geography and power -- Arnold Wolfers: Conceptualizing and consensus -- John H. Herz: Reconciling realism and idealism -- Karl Wolfgang Deutsch: Scientific approaches to politics -- Walter Lippmann: Rationalism and political reason -- George F. Kennan: The War on legalism and moralism -- Louis J. Halle, Jr.: The Crisis as viewed through history -- Raymond Aron: Conflict and the sociological imagination -- Quincy Wright: Beyond the study of war -- David Mitrany: Transcending politics through functionalism -- Charles De Visscher: World order and legal realism -- Arnold F. Toynbee: World civilizations and world politics