who invented the sport american football?
There is absolutely no consensus on the the origin of American football. Here are some really interesting sites:
http://www.thesportsacademic.com/2008/09/how-french-invented-american-football.html
http://wiki.answers.com/Q/Who_invented_the_game_of_Football
http://wiki.answers.com/Q/Who_invented_the_game_of_Football
http://www.scarletknights.com/football/history/first-game.asp
The sport of American football is a team sport that evolved from various versions of football played in the United States in the 19th century. It is difficult to attribute the invention of American football to a single individual as it was influenced by a variety of games including rugby, soccer, and various forms of football that were played in universities and colleges during that time.
However, Walter Camp is widely considered to be one of the most influential figures in the development of American football. He played college football at Yale University in the 1870s and later became a coach and writer on the sport. Camp was responsible for introducing several key rule changes, such as the line of scrimmage and the system of downs, which helped shape the modern game of football. His efforts helped transform football from a rugby-like game into the distinctly American sport it is today.
To get a more detailed understanding of the history of American football and its evolution, you can explore books, articles, and online resources that cover the subject.