there is a coincidence in brain growth, implying group growth, the development of standardized stone tools, and the homo erectus expansion across eurasia combined, all point to increased complexity in economic interactions, thus the emergence of language and stone tools as moneyhttps://twitter.com/NickSzabo4/status/1181604538844758016 …
To trade longer distances than among clan it greatly helps to be able to carry the goods with two "feet" and walk with the other two. Then the brain has to figure out the differences between well-known clansmen and little- or unknown strangers.
-
-
...then, when that difference is figured, use some standardized valuable device to exchange... regarding expansion: I think it was a combo of group growth -> conflict increase -> 'push' individuals & families to populate new areas search for resources was a 'pull' force as well
-
in parallel, it's interesting to think that as clans grew, they did it far beyond the Dunbar number, so even if close kin, groups may have been antagonistic nevertheless
End of conversation
New conversation -
-
-
Walking upright also enabled us to breathe at a different rate than our stride. This ability to control oxygenation allows longer distance travel, etc.
-
it also exposes the front body, chest and pubis, so it could be used as additional information for sexual selection, leading to newer grooming strategies, sexual behavior, thus peer association, etc.
End of conversation
New conversation -
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.