Get a copy of What If? 2 and Randall’s other books at: https://xkcd.com/booksMore serious answers to absurd questions at: https://what-if.xkcd.com/This quest...
Prions and population collapse aside, your cannibal population would eventually succumb to simple nutrient deficiency as the human body can’t synthesize a number of essential vitamins and amino and fatty acids. Without any outside food sources, those nutrients would eventually be completely exhausted.
So if you’re going to start eating people, only eat people who have been a fed a diverse, nutrient-rich diet.
Prions and population collapse aside, your cannibal population would eventually succumb to simple nutrient deficiency as the human body can’t synthesize a number of essential vitamins and amino and fatty acids. Without any outside food sources, those nutrients would eventually be completely exhausted.
So if you’re going to start eating people, only eat people who have been a fed a diverse, nutrient-rich diet.