The history of American football can be traced to early versions of rugby football and association football. Both games have their origin in multiple varieties of football played in the United Kingdom in the mid-19th century, in which a football is kicked at a goal or kicked over a line, which in turn were based on the varieties of English public school football games descending from medieval ball games.
American football resulted from several major divergences from association football and rugby football. Most notably the rule changes were instituted by Walter Camp, a Yale University athlete and coach who is considered to be the "Father of American Football".