Prior to watching this TEDGlobal 2010 talk by Matt Ridley I was unaware that humans began trading among different tribes some 100,000 years ago:
Humans trading is 10 times older then agriculture
Aug 22, 2010 @ 7:26 | 0 comments
Aug 22, 2010 @ 7:26 | 0 comments
Prior to watching this TEDGlobal 2010 talk by Matt Ridley I was unaware that humans began trading among different tribes some 100,000 years ago: