What reason would we have had to have lawns up until we had herded animals that ate grass? Then we walked around on their field and thought, hey, this stuff's nice to walk on...
Eventually, humankind parted to an extent with its close relationship to cows, but thousands of years of having lawns drove us to invent a grass chewing machine, resulting not in meat and milk but in petroleum dependency and the temptation to buy chemical fertilizers for a lawn that would have gotten pooped on and mowed by the same animal.
Goats are also an option, but I have a feeling we first came to follow the cow around.
Just based on something the guy in my avatar talked about (monkeys following cows for a particular reason...). Maybe horses and sheep and goats and donkeys and antelopes and deers etc etc all had lawns we weren't aware of, but if we first met the cow, the cow gave us the idea.
I was always puzzed, why do we have lawns? When did we come to desire a surface of shortened grass? I can't imagine crawling around with shears or a sickle trying to cut a lawn, so anything before the lawnmower made no sense...
Until I thought of cows. And now that I really think about it, I think the stereotypical suburb may have been the source of this funny lawn thing we do, if the suburbs were a way to attract former rural citizens to the city life (a bridge between rural and urban), at which point someone must have invented a lawn mower just to make sure these people had their familiar chewed grass to walk on, without the cow.
Just a thought, not really meant to be serious.
Any other ideas as to why we have lawns?
PS: Mmmmm banana. Back to my monkey roots.