Some equate I.Q. to &quot;mutational load&quot;, meaning that the correction of factors interfering with genetic health gets you to a point where your I.Q. is maxed, not really anything else.<p>I still agree there are tradeoffs but I also doubt that mutational load is ignorable as a major driver of I.Q.; the implication being that if by removing mutation you improve intelligence, the body must be able to support a large I.Q. in the first place.