> "Primitive" is relative, we have evidence of tools and tool manufacturing industries more sophisticated than what any other animal uses dating back a whopping 2 600 000 years ago :
That's kind of the point though with regard to early humans and proto-humans and civilization, isn't it? We've found plenty of evidence of basic stone tool manufacture and use of fire and intentional burials from much earlier eras.
But we haven't found evidence of what we call civilization - and traces of iron tools and irrigation works and cities and monuments ought to be easier to discern than small cut flint if early humans flourished with them over those periods - until the last 10-15k of human existence.
That's kind of the point though with regard to early humans and proto-humans and civilization, isn't it? We've found plenty of evidence of basic stone tool manufacture and use of fire and intentional burials from much earlier eras.
But we haven't found evidence of what we call civilization - and traces of iron tools and irrigation works and cities and monuments ought to be easier to discern than small cut flint if early humans flourished with them over those periods - until the last 10-15k of human existence.