KennanA definitive biography of the U. S. diplomat and prize winning historian George F. Kennan. 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