Truman's containment policy was a key Cold War strategy aimed at preventing the spread of communism, articulated by George Kennan, who emphasized a firm approach against Soviet expansionism. This policy, implemented by various U.S. presidents, evolved over time, balancing between deterrence, rollback, and human rights. Despite criticisms, containment remained a fundamental strategy throughout the Cold War, shaping U.S. foreign policy until the collapse of communism in 1989.