'This is an important book. Brilliantly conceived and argued, Lebow analyzes in the original the texts of three 'classical' realists - Thucydides, Clausewitz and Morgenthau - to argue for a more humanistic and compassionate American foreign policy. Ethical behavior and justice, he argues, are not incompatible with Realpolitik. Fragmentation and compartmentalization have built a firewall between the humanities and social sciences. Lebow calls for a balance, a synthesis. He may, in his own words, be like a 'salmon swimming upstream', but in his case, the journey is worth the effort.' Holger H. Herwig, University of Calgary