[ssh42]

fire and wheel as an example of technological progress (that came after biological). hmmm... Wheel came only 5-10 ths yeas ago and quickly propogated among Afro-Eurasia. ok. But fire? it came 1.5 mln years and fire were the reason of latest biological evolution of our species, with body able to support larger brain. not best example of fast technological progress.

[hordeallergy]

The wheel barely penetrated Africa, parts not seeing it even as recently as a few hundred years.

[ssh42]

Probably different part of Africa we are talking about: https://en.wikipedia.org/wiki/Ancient_Egyptian_technology