Football is a global sport. Football is thought to have originated in twelfth century England and became so popular that the Kings Henry II and Henry IV had to ban it.
It’s a game where the average sized person can excell. The shot to success ratio being low meaning that a team of lesser ability can overcome a better one. What helped with the globalisation of football was Britains global influence. At the peak of its power, the British Empire nearly covered a quarter of the planet, meaning that it was very easy to spread the game of football.