[cheese_goddess]

Jarred Diamond makes a point of this in "Guns, Germs and Steel". I don't have a copy at hand but, from memory, he argues that we domesticated horses but not, say, zebras or onagers because they don't have a disposition that is amenable to domestication. Cheetahs are another famous example, like you say (and I wish we could have domesticated them because then there would be more of them around).

It works the other way also. Humans have the kind of disposition that allows us to domesticate animals. We find it easy to care for other animals. By contrast, lions or wolves would never be able to domesticate sheep because their natural tendency is to kill prey animals on sight, basically. Human's aren't obligate carnivores and despite what some people in certain communities will claim, we are not a predator species and we have no instincts to kill everything that may be food. Check out how little kittens play for example, and how human children play, how many small animals kittens kill and how many small animals human children kill. We have an instinct to nurture and care for other animals and we used it to domesticate our farm animals.

We are not violent, bloodthirsty lions or wolves. We are curious and inquisitive apes and we like to learn new things and figure out how things work. We used this trait to understand how to breed farm animals and how to take care of them and how to use their natural tendencies to our own ends.

And just to be perfectly clear: I don't think that's morally wrong, not in any way, shape, or form and not to any degree at all. It is our compassion and intelligence that has made us farmers of other animals, not our cruelty and greed, like the meat-is-murder people claim. But it is cruelty and greed that is responsible for factory farming and its horrors are something that should rightfully concern us all.