Historrically inteligence has been a trait that had to be balanced with other factors in natural selection, traits such as having lower energy consumption, lowe

Historrically inteligence has been a trait that had to be balanced with other factors in natural selection, traits such as having lower energy consumption, lower reaction time were important in the past in a way they simply aren't today. Sacrificing in other less relevent areas could easily lead to intelligence gains. (Note I am not advocating for gene editing) Also I don't think we have reached a local maximum, human society kind of fucks with natural selection so I imagine there is room for improvement.