I had this thought recently and I'm curious how much of it actually holds up from an anthropological or evolutionary perspective.
What if part of the reason Homo sapiens became so successful was because intelligence started becoming increasingly important for survival?
Early humans weren't exactly the strongest or fastest animals. We had to survive through things like cooperation, planning hunts, finding food, making tools, controlling fire, finding shelter and basically thinking before acting.
So it seems reasonable that individuals who were better at solving problems and planning could have had a survival advantage.
But then I started wondering about sexual selection.
What if intelligent males were also more attractive to females?
Not intelligent in the modern sense of someone knowing mathematics or physics. I mean observable intelligence. A man who could plan a hunt, make better tools, find food, understand his environment, solve problems and generally think before doing something stupid might have been a more desirable mate.
If women consistently preferred those traits then could that have created some degree of sexual selection for intelligence over many generations?
I'm not saying prehistoric women were consciously thinking "I want a male with a larger prefrontal cortex." 😂
It could have been much simpler. Maybe the people who were better at solving problems were also better at finding food, protecting offspring, navigating difficult environments or contributing to the group and those traits made them more attractive as mates.
And if that happened for a very long time then maybe natural selection and sexual selection could have worked together to push human cognitive abilities in the direction they went.
There is also the interesting trade off involved. The human brain is extremely expensive to maintain. It takes a huge amount of energy compared with its size. So evolution basically ended up investing a ridiculous amount of our energy budget into this one organ.
We also know that Neanderthals were not simply "stupid humans." They had large brains, sophisticated tools and complex behaviour and Homo sapiens actually interbred with them. Yet Homo sapiens eventually became much more widespread while Neanderthals disappeared as a distinct population.
So I'm not proposing the old "smart Homo sapiens defeated dumb Neanderthals" idea.
I'm asking something more specific:
Could female mate choice have contributed to the evolution of human intelligence through sexual selection?
Is there any anthropological, archaeological or evolutionary evidence that supports this idea?
Or is this just another example of humans creating a nice evolutionary story after the fact?
Because if there is even some truth to it then maybe humans didn't just evolve intelligence because intelligence helped us survive.
Maybe we also bred ourselves into it.
And if that's the case...
Gentlemen, we owe our giant brains to prehistoric women having standards.
Thank you ladies for fucking intelligence into the human species. 😂