[ExI] comments?

[Rafal Smigrodzki]

On Tue, Aug 11, 2020 at 7:19 AM John Clark <johnkclark at gmail.com> wrote:

>
> I'm sure sexual selection was a factor but it's a factor in all species, however
> there must be something special about humans because only they have
> developed the sort of intelligence needed to have a technological
> civilization, and I think that special thing is bipedalism.
>

### Bipedal apes have been walking around for 3.9 million years and getting
nowhere fast. Then suddenly culture exploded in the past 200 kyr. It wasn't
from improved legs.

Read "The secret of our success", it's very persuasive.

Rafal
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