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Some interesting stuff here on why we eat what we eat (and a whole lot more)
https://en.wikipedia.org/wiki/Guns,_Germs,_and_Steel
"surprisingly few animals are suitable for domestication. Diamond identifies six criteria including the animal being sufficiently docile, gregarious, willing to breed in captivity and having a social dominance hierarchy."
en.wikipedia.orgGuns, Germs, and Steel - Wikipedia