X Article

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The Sources of Soviet Conduct, often called the X Article, is a 1947 piece by George F. Kennan written under the pseudonym "X" and published in Foreign Affairs. It popularized the idea of containment and argued that the United States should use patient, firm pressure to limit Soviet expansion.

The article drew on Kennan’s earlier, secret long telegram from February 1946, known as 511. That telegram explained what he saw as the true motives of the Soviet leadership after Joseph Stalin’s February 1946 speech. The speech alarmed many in the United States, who worried that the Soviets planned wide expansion. Kennan’s telegram argued that the Soviet leadership viewed the outside world as hostile and used ideology to justify ruling through fear and control. It said the West could not expect real cooperation from the Soviets.

In the telegram, Kennan described two levels of Soviet power: the official government that talked with other nations, and a more hidden, often sabotaging side that tried to weaken the West. He argued the Soviets would be patient and persistent, not quick to surrender, and that the best American response was long-term containment—keeping the Soviets from spreading their influence without provoking a direct war.

Containment, Kennan wrote, would involve applying counter-force at every point where the Soviets showed encroachment. He believed the Soviet economy and leadership would be vulnerable to internal problems, and that the United States could eventually cause the Soviet system to weaken or retreat. He also stressed the importance of educating the American public about the communist threat and keeping Western societies strong.

Kennan wrote the X Article after leaving his government post long enough to publish anonymously. The piece, published in July 1947, carried only the signature "X." It echoed many ideas from the long telegram, presenting a clear case for containment as the central U.S. policy toward the Soviet Union. Although it came before President Truman publicly announced the Truman Doctrine, many readers saw the article as endorsing the same approach to stopping Soviet expansion.

The article was widely read by U.S. policymakers, military leaders, and others. It helped shape thinking about American strategy during the early Cold War. Some praised it as a key articulation of U.S. policy; others criticized it for giving the Soviet Union ideas or for presenting strategic risk. The piece made Kennan famous as a leading expert on the Soviet Union.

The revelation of Kennan as the author came after a New York Times column drew attention to the article. The disclosure led to controversy, with different people weighing in on its influence and accuracy. The Soviet leadership even read a version of the telegram-like analysis that circulated in Washington, showing how closely U.S. and Soviet observers watched each other.

Over time, many scholars said the X Article helped establish containment as the central U.S. strategy during the Cold War. Some argue it was the main driving force behind U.S. policy, while others say the government was already moving in a similar direction. Kennan himself later reflected that the article helped to define American policy, even as he adjusted some of his ideas.

In the years after, Kennan refined his own terms, moving from the idea of “perimeter defense” to focusing more on “strongpoint” defense of key areas. He also acknowledged that his views reflected certain assumptions of his time, including some criticisms of non-Western regions and peoples.

The X Article is best remembered for introducing containment as the guiding idea of how the United States should respond to Soviet power. It helped shape U.S. strategy for much of the Cold War and solidified Kennan’s reputation as a leading expert on Soviet affairs.