A nation must think before it acts.
John Lewis Gaddis, George Kennan: An American Life. Penguin Press, 2011.
John Lukacs, George Kennan: A Study of Character. Yale University Press, 2007.
John Lukacs, ed., Through the History of the Cold War: The Correspondence of George F. Kennan and John Lukacs. University of Pennsylvania Press, 2010.
Nicholas Thompson, The Hawk and the Dove: Paul Nitze, George Kennan, and the History of the Cold War. Henry Holt and Company, 2009.