| Locknuts said: Yep, like the freezing cold that humans managed to migrate to. Those without the intelligence to survive simply perished and that kind of intelligence became a desirable trait for the females. Also, post industrial revolution, the ability to work a repetitive 8 hour work day (not a natural human trait) was a desirable trait as those who couldn't either run a business or work a full work day didn't get paid. I believe (and there is some evidence to support this) these things accelerated the differences so that great changes happened over a relatively short period of time. |
@Bold well we don't know if females specifically preferred intelligence at the time but if an individual couldn't survive the cold weather via whether it'd be physiological or neurological adaptations then they wouldn't be passing their genes anyway ... (sometimes entire populations die out as well)
And yes you have the right idea that evolutionary pressure will escalate natural selection regardless of the span of time ...
