George F. Kennan is well known as the preeminent American expert on the Soviet Union during the Cold War and the author of the doctrine of containment. In Mr. X and the Pacific, Paul J. Heer chronicles and assesses Kennan's work in affecting US policy toward East Asia. Heer traces the origins, development, and bearing of Kennan's strategic perspective on the Far East during his time as director of the State Department's Policy Planning Staff from 1947 to 1950. The author follows Kennan's career and evolution of his thinking as he subsequently became a prominent critic of American participation in the Vietnam War. Mr. X and the Pacific offers readers a new view of Kennan, revealing his importance and the totality of his role in East Asia policy, his struggle with American foreign policy in the region, and the ways in which Kennan's legacy still has implications for how the United States approaches the region in the twenty-first century.