Which policy was developed by diplomat George F Kennan?

George F. Kennan developed the policy of containment, aimed at preventing the spread of communism during the Cold War. This strategy emphasized the need to contain Soviet influence and expansion through a combination of military, economic, and diplomatic measures. Kennan articulated this approach in his famous "Long Telegram" in 1946 and later in an article published under the pseudonym "X" in 1947. Containment became a cornerstone of U.S. foreign policy for several decades.