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It's because of its origins. It's a variation of rugby, which was also called rugby football. In fact, kicking the ball was predominant early on. Running and passing became the norm much later

I see! Actually, I once read about the history of football and once it was just the same sport. Then some schools in Britain started started playing with different styles - Rugby & Eton. With the latter school the football...

... we now know globally was formed.