It seems likely to me that our civilization and technology developed at the earliest possible point it could have, in which case the high-IQ genes are simply not fixated yet, but would be if we hung around for a few (tens of) thousands more years. For that matter, there’s no reason not to think we’d go well above our current maximum.
I would add a fourth possibility:
Lack of time.
It seems likely to me that our civilization and technology developed at the earliest possible point it could have, in which case the high-IQ genes are simply not fixated yet, but would be if we hung around for a few (tens of) thousands more years. For that matter, there’s no reason not to think we’d go well above our current maximum.
Apparently smart people have fewer children than average.