Cannibalism could keep people alive—so why did humans reject it almost everywhere?

From ancient graves to stories of survival on the frontier, signs of human flesh-eating turn stomachs, even as they raise questions. Anthropologists have uncovered bones cut up with axes and chops—like a skull from England dating back 14,700 years that had the meat scraped off its jaws. Such finds confirm that our ancestors sometimes ate each other, but now every human culture views cannibalism as a final taboo. But if eating kin saved lives, why didn't it become routine?