Truman Doctrine The Truman Doctrine was the impetus for the change in United States foreign policy, from isolationist to internationalists; thus we were drawn into two wars of containment and into world affairs. The Truman Doctrine led to a major change in U.S. foreign policy from its inception - aid to Turkey and Greece - to its indirect influence in Korea and Vietnam. The aftermath of World War II inspired the U.S. to …showed first 75 words of 2348 total…

…showed last 75 words of 2348 total…of the World.\" (McCullough, 571) Would the world have been a worse place if we had not acted to protect South Korea and South Vietnam? Would the U.S.S.R. have fallen due to its own economic instability and only fleeting control over its massive population? These questions can be cogitated but never answered. One thing is certain, people should not die for a cause that is nonexistent, or one that could have destroyed itself.