Also when applying this to humans: almost all hunter gatherer societies were physically larger and stronger than agriculturalists because they had healthier and more varied diets. One of the biggest reasons that hunter gatherers were replaced by agriculturalists is that agriculture gave a more stable food supply and that let them have more kids.

Survival of the fittest is always misunderstood by pseudoscience dumbfucks. Fittest doesn’t mean strongest, it means ability to fuck and reproduce before you die and nothing else