X Article

The "X Article," also known as "The Sources of Soviet Conduct", was published in Foreign Affairs in 1947. Though signed pseudonymously by "X," it was well known at the time that the true author was George F. Kennan, the chief of mission to the USSR from 1944 to 1946. The article is famous because it set forth the doctrine of containment.

Primary source

• Fulltext of "The Sources of Soviet Conduct