American football evolved from rugby and soccer influences in the 19th century, with the game taking shape through contributions from various people. Walter Camp, often called the "Father of American Football," is credited with inventing and shaping the modern game. He introduced key elements such as the line of scrimmage, the system of downs, the 11-player team, the quarterback position, and a standardized points-scoring system. Camp's rule changes in the 1880s transformed rugby into the distinct sport known today as American football.
The first official American football game, played between Rutgers and Princeton in 1869, used rules that resembled rugby more than modern football. Over time, especially with Camp's involvement at Yale and in national rules committees, American football developed into a unique sport with strategic and safety improvements.