Domino theory Domino theory The domino theory was a theory prominent from the 1950s to the 1980s that posited that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect. The domino theory was used by successive United States administrations during the Cold War to justify the need for American intervention around the world. U.S. President Dwight D. Eisenhower described the theory during an April 7, 1954, news conference, when referring to communism in Indochina: In 1945, the Soviet Union brought most of the countries of eastern Europe and Central
Pius XII, The Holocaust, and the Cold War later asserting that "Loftus and Aaron told a tale that was mostly accurate."" David Kertzer wrote in "The American Historical Review" ""The new material that Phayer has brought to light from the National Archives offers a useful contribution to our understanding of the controversial relationship between the Vatican and the perpetrators of the Holocaust, especially in the postwar period"." Pius XII, The Holocaust, and the Cold War Pius XII, The Holocaust, and the Cold War is a 2008 book by historian Michael Phayer which makes use of documents that had been released under US President Bill Clinton's 1997 executive order