Final answer:
The policy of containment originated from George Kennan's 'Long Telegram' and its purpose was to confine Soviet influence and prevent the spread of communism.
Step-by-step explanation:
The policy of containment originated from George Kennan's 'Long Telegram' in 1946. Kennan believed that the Soviet Union was a totalitarian bureaucratic regime that sought to destroy rival nations and expand its own influence. He recommended containing Soviet influence through economic policy and preventing its political expansion into new areas. The purpose of containment was to confine Soviet influence to Eastern Europe and prevent the spread of communism throughout the globe.