Can’t remember the name of the book, but the authors thesis was that cannibalism, specifically cannibalism that involved eating the brains of the victim, was the cause of the sudden jump in the evolutionary path that led to homo sapiens.
Something distanced homo sapiens from the other hominid species and they believed that the brain contains additional nutrients (or whatever) that enhanced the brains of the cannibal species that evolved to homo sapiens.
At least it is an alternative to Ancient Aliens tinkering with our DNA to create us in their image. :-)
Pass the frontal lobe, please.
That’s amusing, but Kuru and Creutzfeldt-Jakob disease are both killers, and both result from cannibalism (I think many people learned this from The X-Files).