The Cognitive, Great Leap Forward in Human Evolution

When he first started thinking about this say 20 years ago, we didn't know how many genes there were in the human genome. And so if you told me that intelligence was like a hundred genetic positions, I'd be like, okay, that sounds plausible. It turns out it's close to a thousand. So why did you used to think their traits in general were simpler than they actually are? You know what I'm saying? Like if you're doing a science, you kind of want it to be tractable.like that's why you're doing it.