The Containment Theory became the intellectual groundwork for US foreign policy in the early 1950s as first Russia and then China were taken over by Communist governments.
What theory was used by the United States government to justify intervention in many countries around the world during the Cold War?
a. domino theory
b. atomic theory
c. brinkmanship theory
d. mutually assured destruction theory
The correct answer is a). domino theory.
Domino theory says that if one country is take oven by communism, its neighboring countries might follow, and it gives a reason for other counties to worry.