[ExI] What if humans were twice as intelligent?

[Keith Henson]

> From: Anders Sandberg <anders at aleph.se>

> On 2013-10-14 11:00, BillK wrote:

>> It doesn't mention that for humans high intelligence now seems to be
>> an evolutionary disadvantage. The top 20% don't reproduce nearly as
>> much as lower IQs. High IQ acts like a form of birth control.
>
> The effect is fairly weak. While the image of Idiocracy is vivid, when
> you actually sit down and simulate genetic equilibria of numerous small
> IQ-related genes you will find that the anti-intelligence selection
> effect is not doing much.

Don't forget that selection is happening on both ends of the
intelligence spectrum.

Which is typical for any trait you can measure.  If it was not, then
the center of the curve would drift until selection on both ends was
equal.

Keith