Walter Camp transformed rugby football into American football. For more information about Walter Camp see the Answers.com link below.
American football more positions and better contact
football is more popular than football!
Football (Soccer) and American Football is more popular than basketball
They are both the same sport, unless you referring to American Football and soccer, in which case then American Football is much more dangerous.
yes much more
either football, that is American football or English football, both are more popular than tennis.
Considering that there are more players on a football team than a basketball team.. yes its possible that there are more injuries occurring in American football than basketball
If by football you mean soccer, then football would be more liked. If by Football you mean American Football, then Football would still be more liked. It's all a matter of personal opinion. Some people may like football more (regardless if it is proper football (soccer) or American football (as in the NFL)), while others, still, may enjoy rugby more.
Well considering you are talking about gridiron football, Canadian American football has a widerfield, bigger endzones, and more wide receivers.
Worldwide, there are literally billions more people who play and watch football than those who watch American football. The US is the only country where American football is more popular than football.
American football is not more recognised than other sporting codes, football or soccer as American's call it, is the most recognised sporting code.