Who do you suppose it was in history who first looked at a horse and thought to himself: “Hey, that animal’s strength, size, and general demeanor would make that creature the perfect beast of burden.”?

“Just look at it!” this opportunist must have said to himself. “That animal’s back is perfectly contoured to form a mobile, steerable seat for my ass, and the animal itself is just tall enough so that my feet don’t touch the ground.”

Poor horses. They got the evolutionary shaft.