domino theory

domino theory


Definition of DOMINO THEORY

:  a theory that if one nation becomes Communist-controlled the neighboring nations will also become Communist-controlled
:  the theory that if one act or event is allowed to take place a series of similar acts or events will follow


from the fact that if dominoes are stood on end one slightly behind the other, a slight push on the first will topple the others
First Known Use: 1965

domino theory

noun    (Concise Encyclopedia)

Doctrine of U.S. foreign policy during the Cold War, according to which the fall of a noncommunist state to communism would precipitate the fall of other neighbouring noncommunist states. The theory was first enunciated by Pres. Harry Truman, who used it to justify sending U.S. military aid to Greece and Turkey in the late 1940s. Dwight D. Eisenhower, John F. Kennedy, and Lyndon B. Johnson invoked it to justify U.S. military involvement in Southeast Asia, especially the prosecution of the Vietnam War.


domino theory or domino effect


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