Re: About early man
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Early humans had plenty of time to think. The task of hunting and gathering has long moments of time that can best be described as "mundane".
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In general, things change because of pressure. If you are correct that "early humans had plenty of time ..." that aren't focused on food, warmth, safety of person, then they'll spend that 'free' time the same way we do ... hanging out with friends and family. That's one reason we're called social animals :-)
Now, when food and safety are hard to achieve and take a lot of time, that's when ingenuity kicks in. Pressure, the same thing that cases most biological evolutionary changes.
Unfortunately, for the most part "if it ain't broke, don't fix it" is how animals approach life ( humans included). In the absence of pressure, at any given time the current system is working, it's not broken.
The scarcity of early humans would put little pressure on them. Need to get to larger groups bumping into each other and the advantage of specialization of tasks to emerge to see an increase in the speed of 'progress'.
luckyme
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