Lord Denning wrote:
I have no idea. To be different?
It's like asking why American football, Australian rules football, and football for the rest of the world don't have the same rules. There really isn't an answer.
Well, those other games are not really the same thing at all. The two styles of North American football are at least using the same equipment, an oval ball, field with the same markings, posts for conversions etc.
Gaelic football, Australian (no) Rules (
), Association Football, Rugby Football are all very different games.
There are two types of Rugby and one of them has similar principles to the Grid Iron game. Rugby League was a breakaway from Rugby Union as some wanted to go professional while others wanted it to remain Amateur.