[cLeEOGPw]

So far intelligence don't seem to be as one-sidedly positive trait as it seems for most here. With increased intelligence comes increased risk factors of many diseases like depression, anxiety, bipolar, and many others. That means that less intelligent people have actually more reliable brain health than more intelligent. So unless this problem is solved, simply adding the genes that, among other things, increase IQ, can backfire in unforeseen ways.

Another thing is more intelligent people are predisposed to be less reproductive. In this way lesser intelligence is a balancing force for mental health and survival of species.