<p><b>A definitive biography of the U.S. diplomat and prize-winning historian George F. Kennan</b><br><br>The diplomat and historian George F. Kennan (1904¿2005) ranks as one of the most important figures in American foreign policy¿and one of its most complex. Drawing on many previously untapped sources, Frank Costigliola¿s authoritative biography offers a new picture of a man of extraordinary ability and ambition whose idea of containing the Soviet Union helped ignite the Cold War but who spent the next half century trying to extinguish it. Always prescient, Kennan in the 1990s warned that the eastward expansion of NATO would spur a new cold war with Russia.<br><br>Even as Kennan championed rational realism in foreign policy, his personal and professional lives were marked by turmoil. And though he was widely respected and honored by presidents and the public, he judged his career a failure because he had been dropped as a pilot of U.S. foreign policy. Impossible to classify, Kennan w