@vgr fire certainly, wheel much less clear, maybe language or agriculture in it's place?
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@vgr pen & sword (crude versions of each - sharp stick & etching stone)Thanks. Twitter will use this to make your timeline better. UndoUndo
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@vgr in different ways, I'd suggest either abstract speech, or the plow, as root nodes.Thanks. Twitter will use this to make your timeline better. UndoUndo
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Adam as fire and Eve as agriculture seem like good metaphors. Wheel came later
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@vgr stone axe? Pointy stick? Flint knives?Thanks. Twitter will use this to make your timeline better. UndoUndo
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@vgr Stone tools: predate wheel. Spears, arrows possibly helped to develop language, motor skills. http://m.rstb.royalsocietypublishing.org//content/367/1585/37 …Thanks. Twitter will use this to make your timeline better. UndoUndo
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@vgr The 'thought narrator/internal voice' and language seem likely candidates.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@vgr In James Burke's "Connections", he make a case for the Plow. Surplus food means some can become innovators instead of farmers.Thanks. Twitter will use this to make your timeline better. UndoUndo
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