Peterson's 12 Rules For Life, have you heard of this?

[Amarok]

Well, I've done some superficial searching and I can't find any mention of "women saying no" being a cause of our large brain sizes. I've seen plenty of possible explanations, but not this one. I don't see how it's any more significant in (pre) humans than other animals, nor how this would be any kind of cause of big brains. If anyone has any knowledge about this, I'd be interested to know!

 Issue i have always had with the Brain size idea is the assumption the issue stems from 

1. That even between species brain size does not equal intelligence as exemplified by the fact  neanderthals had larger brains then ourselves and i that despite having a smaller then most mammals they have as many  neurons as an average  mammal  

2. Between humans there is a correlation between intelligence and size as (the number of Neurons etc) What's more important is the number of connections  between Neurons . While this tend to be found in people  with large brains it's not in fact the brain size  that's key it's the efficiency of the brain which of course can also be found in small brains .

3. Another from evolutionary perspective is the issue of big brains. Big brain are resource heavy while small ones are less so and even though a larger brain has a larger processing power most of the is noise. If a small brain can be just as efficient as a large brain and by this metric be just as intelligent why did selection choose a large brain rather then a more efficient less resource hungry brain ? And why did this not translate through sexual selection .

4. Lastly i will point out that our brains are shrinking and have been for some time