The greatest and most popular sport in history with more than 5 times the TV audience of the next most popular (cricket - every radio and TV in the sub-continent is permanently tuned to Pakistan/India cricket matches - that's a big audience).
Only Americans call it 'soccer' owing to their vast ignorance of what goes on outside their national boundaries and the misnomer which has them thinking than a corruption of rugby, with all the danger and most of the skill removed can also be called 'football'.
'The Beautiful Game' can be played anywhere, on almost any surface, by any number of players, for almost any length of time. And is. There is no country on earth that doesn't play. It has inspired more passion, more courage and more excitement than any other sport in history and dwarfs everything else.
Football is, without question, the defining sporting activity of the human race.