The answer is ethnocentrism.
That's a myth. The Doubleday myth refers to the belief that the sport of baseball was invented in 1839 by future American Civil War general Abner Doubleday in Cooperstown, New York. Abner Graves presented a claim that Doubleday invented baseball to the Mills Commission, a group formed in 1905 that sought to prove whether the sport originated in the United States or was a variation of rounders. Graves' evidence was accepted by the Commission, and in 1908 it named Doubleday as the creator of baseball. The claim eventually received criticism, and most modern baseball historians consider it to be false.The myth nevertheless led to the National Baseball Hall of Fame and Museum's being located in Cooperstown.
