bernard Wrote:
-------------------------------------------------------
> Principia Wrote:
> --------------------------------------------------
> -----
> > Curiosity:
> >
> >
> > How did humans worldwide - within a span of
> a
> > couple of millennia - all pick up on the idea
> of
> > crop farming even though they were separated
> by
> > continents and oceans? What was so common in
> their
> > environments that would lead Africa, North
> > America, Asia and Europe to a similar
> activity?
> > For Africa, Asia and Europe I can accept an
> idea
> > being transferred from tribe to tribe and
> from
> > region to region over a thousand years (it's
> a
> > long time), but how did it get to North
> America?
>
> Did not:
> Bruce D. Smith. 1992. “Prehistoric Plant Husbandry
> in Easter North America,” in C.W. Cowan and P.J.
> Watson, eds. The Origins of Agriculture,pp.
> 101-119. Washington, D.C.: Smithsonian
>
>
> Initial domestication of eastern seed plants
> 4000-3000 B.P. (2050-1050 B.C.
> Bernard

I don't get what you mean with 'did not'. And the above time frame (4-3000BP) is still within the frame of non-possible culture transfers between the last Berring crossing and the arrival of Vikings. The mid-to-late Holocene is when agriculture became a staple all over the world. I aksed how it got to North America if it was not possible to have tribe-to-tribe | region-to-region transfer of knowledge, and it looks like a natural outcome of population increase (with subfactors).