Define Domino Theory of Accident Causation?

The Domino Theory dealt with the idea that if any country fell to Communism, all the surrounding countries would also fall to Communism, like dominoes. The following is a quote from President Eisenhower in 1954:

"Finally, you have broader considerations that might follow what you would call the "falling domino" principle. You have a row of dominoes set up, you knock over the first one, and what will happen to the last one is the certainty that it will go over very quickly. So you could have a beginning of a disintegration that would have the most profound influences."