The original source for the doctrine of containment was the

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The Long Telegram, written by American diplomat George F. Kennan in 1946, is considered the original source for the doctrine of containment. Kennan's telegram outlined his views on the Soviet Union and argued that the best way to deal with their expansionist tendencies was through a policy of containment. This policy became the basis for US foreign policy towards the Soviet Union during the Cold War.

The Original Source for the Doctrine of Containment Was the