Carnivory, specifically the introduction of meat and organs into the human diet, was critical for human evolution by enabling earlier weaning than great apes.

“carnivory appears to provide both a necessary and sufficient explanation as to why humans wean so much earlier than great apes meaning that when you are eating meat the breast milk is more nutrient-dense you can wean earlier and that they say since early meaning yields shorter intervals between births and higher rates of reproduction with profound effects on population dynamics our findings highlight the emergence of carnivory as a process fundamentally determining human evolution”