Milk has been humanity's most argued-over food for millennia

Kurlansky opens with the claim that few foods have generated as much sustained controversy across as many centuries as milk, whose safety, morality, and handling have been debated continuously since animals were first domesticated around 9000 BC in the Middle East and Anatolia. Arguments have ranged from whether milk is fit for human consumption, to who should feed infants and how, to which animal produces the safest supply.

He frames this as different from disputes over other staple foods, since milk carries unusually intense emotional weight tied to motherhood, purity, and infant survival, stakes that turned even technical questions like pasteurization into moral battlegrounds. Disputes over raw versus pasteurized milk echo across eras precisely because the underlying anxiety about trust and safety never fully resolves.

This framing sets up the book as less a chronicle of dairy technology and more a study of how one food has repeatedly become a proxy battlefield for larger cultural anxieties.

Takeaway: when a food generates outsized controversy, look for the deeper anxiety about trust or purity it's really standing in for.