If we assume that nature is complex, which it is to my understanding, then we can assume certain natural constructs are not temporal in our subjective sense of time.
So we can assume that nature has a direction since we do when we say things like survival of the fittest.
But is it possible nature does not intend our survival? Maybe nature has made us to be terraformers or transformers of the earth and our purpose is to end ourselves while simultaneously making earth's environment more like mars. If that's the case then it would make sense that nature would prune out the fittest candidates for the longevity of the human species as a catalyst to end our time here on the surface of earth. Perhaps just enough people who are smart are left to reproduce so as to prolong our existence to the exact moment earth becomes uninhabitable and then after that we end.
If that's the case then survival of the fittest is kind of a misnomer..and since we will never know what nature intends we are forced to admit it's possible nature wants the least fit to survive or survival of the fittest up to a point and then after that we need just enough dumb people to cause the end of humanity.
discuss if you want. I'm not fully sure I believe this. I'm just trying to come to grips with why more people with above average intelligence don't reproduce. It's as if nature doesn't like smart people. Perhaps having an average IQ over 120 is not something nature wants humanity to have. Perhaps it is considered a weakness?