Insulin resistance may be an evolutionary adaptation that allows more glucose to be available for brain function.

“another theory that he came up with is a soldier to diplomat hypothesis which I found very interesting were initially we might look at this problem as being something that allowed us to preserve more glucose for brain function so insulin resistance really is a evolutionary adaptation that allows more glucose to be available so our brain can use it to really thrive and survive we always talk about our primitive ancestors in terms of musculature but you need to have adequate amounts of glucose reserves so you can go up the social hierarchy and you can lead a tribe”