By the turn of 1947 it appeared that Truman’s foreign policy was foundering. His secretary of agriculture, Henry A. Wallace, had been outspoken in criticism of the Baruch Plan and of the policy of “getting tough” with the Soviets. Upon resigning he became a leader of those whom Truman privately described as the “Reds, phonies and the parlour pinks” that he feared were “a sabotage front for Uncle Joe Stalin.” The 1946 elections then returned a Republican Congress bent on cutting costs and “bringing the boys home.” Yet the United States was on the verge of the greatest reversal of its foreign policy traditions since 1917. On February 21, 1947, the British government announced that its economic difficulties would force it to suspend economic and military aid to Greece and Turkey by March 31. Greece was embroiled in civil war provoked by Communists. Turkey was under Soviet pressure for bases and naval passage through the Dardanelles. If those countries succumbed to Communist influence, the Mediterranean and the entire Middle East might follow. Truman, his new secretary of state, George C. Marshall, and Marshall’s deputy, Dean Acheson, resolved at once that the United States must step in. On February 27 Acheson impressed congressional leaders with a vivid account of the Soviet strategy of expansion and its implications for American security. After a tense silence, Republican Senator Arthur Vandenberg vowed to support the new policy if Truman would explain it with equal clarity to the American people. On March 12, Truman accordingly told Congress that “at the present moment in world history nearly every nation must choose between alternative ways of life. The choice is too often not a free one. . . . It must be the policy of the United States to support free people who are resisting attempted subjugation by armed minorities or by outside pressure.” He asked for $400,000,000 in aid specifically for Greece and Turkey, but the Truman Doctrine thus propounded universalized the American commitment to contain the spread of Communism.

The mobilization of American might for this task followed swiftly. On June 5, 1947, at Harvard University, Marshall called for a massive program of foreign aid to help the European states recover. In July, Kennan, signing himself “X,” educated the public on “The Sources of Soviet Conduct” and outlined the strategy of containment in the journal Foreign Affairs. The National Military Establishment Act of 1947 (in the works since the war) created a permanent Joint Chiefs of Staff, a single secretary of defense, the U.S. Air Force as a separate service with its nuclear-armed Strategic Air Command, and the Central Intelligence Agency (CIA). Kennan himself soon criticized the Truman Doctrine as indiscriminate and excessively military. Drawing on classical geopolitics, he narrowed U.S. interests to the protection of those industrial regions not yet in the hands of the Soviet Union (North America, Britain, Germany, and Japan). In practice, however, defense of those regions seemed to require defense of contiguous areas as well. Japanese security, for instance, depended on the fate of Korea, and European security on not being outflanked in the Middle East. American responsibilities, therefore, could easily appear to be global.

The Marshall Plan was born in the State Department in response to the fact that western Europe was making little progress toward prosperity and stability. Britain was exhausted and committed to the Labour government’s extensive welfare programs. In France, Charles de Gaulle’s postwar government quickly gave way to a Fourth Republic paralyzed by quarreling factions that included a large, disciplined Communist party. In Italy, too, Communists threatened to gain power by parliamentary means. All suffered from underproduction, a shortage of capital, and energy shortages exacerbated by the severe winter of 1946–47. Marshall therefore put forward a plan for cash grants to a joint European economic council “to assist in the return of normal economic health, without which there can be no political stability and no assured peace.”

The British foreign secretary, Ernest Bevin, spoke for western Europe when he told Parliament, “When the Marshall proposals were announced, I grabbed them with both hands.” At Kennan’s insistence, Marshall aid was offered to all of Europe, including the Soviet bloc, but Stalin denounced the plan as a capitalist plot. The one eastern European state not yet communized, Czechoslovakia, attempted to join the Marshall Plan, but Communist pressure forced it to back out. In February 1948, less than 10 years after Munich, the Czech Communist party subverted the republic and Czech democracy again fell to totalitarian rule, a tragedy punctuated by the suicide—or murder—of Foreign Minister Jan Masaryk. Stalin reinforced his attack on the Marshall Plan by reviving the Communist International, now called the Communist Information Bureau (Cominform), in October 1947 and by escalating ideological warfare against the West.

The new hope kindled in western Europe by the Marshall Plan helped secure the defeat of the Communists in the 1948 Italian election (the $1,000,000 of CIA funds for the Christian Democrats was hardly decisive) and stabilize politics elsewhere in western Europe. Under the Marshall Plan, the United States then transferred $13,600,000,000 to the stricken economies of western Europe in addition to $9,500,000,000 in earlier loans and $500,000,000 in private charity.