YBurnMeat ?
Because human is Herbivore

Brain Size, Genesis, Gestation & Number of Babies
 
Dog Litter Pig Litter
Herbivore Omnivore Gestation & # of babies
Gorilla's diet is ~99% Plant-based.          
Chimp's diet is ~94% Plant-based.
Orangutan's diet is ~99% Plant-based.       Baboon's diet is ~85% Plant-based.

Among land mammals over 40 LBs (closest to our evolutionary tree), MOST herbivores have longer gestation (>8 months) and/or give birth to one baby at a time

Whereas ALL Omnivores & Carnivores have shorter gestation (<6 months) and/or give birth to multiple babies at once

Given the extreme complexity of the human brain, a longer gestation period of herbivores (9 months) provides more time for brain growth & development of a single human baby in the womb

Evidence-Proof
According to research, the rate of mental retardation is generally considered higher among twins and premature births, primarily due to the increased risk of lower birth weight and shorter gestational age, which can impact neurodevelopment (Brain Development).

Please also see:
Fastest Brain Growth (human baby's brain) on lowest % Protein (Human Breast Milk)

Ray Arjo  FB   5/2023

Based on pictures among apes, the more meat in the diet, the smaller the brain & body.
(We are part of the great ape evolutionary tree)

Among Apes, More Meat in Diet=Smaller Brain