Why does evolution select against intelligence & logic?
Why do humans make societies so self limiting?
For the most part humans are as intelligent as they need to be, in the same way they are as strong as they need to be. It seems likely that there are drawbacks to extreme intelligence, especially in the conditions we humans evolved in for most of our time on this planet. I think Aldous Huxley hinted at the possible outcome of this when he talked about the chaos of a colony composed of Alpha Double Plusses in Brave New World. It fell apart because there was no social cohesion; everyone was constantly trying to backstab their way to the top positions.
It seems likely to me that our chief competitor for most of human history has been other groups of humans. Too dumb in comparison to the surrounding tribes, sure to be beaten in warfare and destroyed. Too intelligent, with too much individualism, and they'd be beaten by the dumber tribe that had better social cohesion (and therefore cooperation).