> if a single tweak could significantly enhance mental abilities, evolution would have probably given it to us already Only if the tweak were beneficial to hu

> if a single tweak could significantly enhance mental abilities, evolution would have probably given it to us already Only if the tweak were beneficial to humanity as a whole would we all have it. We have developed many traits (such as selflessness) that are not in our best interest, but are in the best interest of our society. It is quite plausible that evolution has found that tweak, but has only given it to a small minority of people, much as it has only given autism to a small minority of people.