Re: Intellectual Abundance
I wonder if the peacock is pondering.
Selection pressures come at us from all sides. So, besides the obvious 'it was for other uses', such as language, trajectories, large social structure to track, etc, it's possible it's even more frivolous, such as 'quicker wit', or better story teller.
I'm not convinced we don't need it all. People with 90 IQ would be in pretty tough shape in a less coddling society. Evolution can be very slow and if was more impoprtant 5000 years ago we'd still be enjoying the benefits of it.
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