>>16705328The scots didn't have wheels until 1200BC, which is 2800 years behind the wheel's first invention. They nearly had blacksmithing before the wheel. Hilly country, wooden wheels are brittle, just not all that useful until people started to need to build big forts to protect themselves from frequent land squabbles.
The aztecs put wheels on children's toys, hell their damn calendar is a wheel, they had the concept, but had no carts for transportation, no wheels for practical purposes. they domesticated the llama for that. Because their empire was built on top of a mountain.
West Africa had SOME wheel use pre-colonial, but West Africa... also has plains.
It's also the sole semi-valid claim to Kangz in Sub-Sahara other than Ethiopia which borders the middle east and thus has as much influence as North Africa. They were slaver kingdoms, their prisoners of war the source of transatlantic chattel. But they were kingdoms.
Are they so much smarter than all the other sub-saharan regions? According to OP's chart and the literacy chart, probably not. Aside from a couple high 80s and low 90s, they're some of the lowest on the chart.
So no, if you have shitty land for wheels, and you never establish the massive infrastructure required to build flat roads to force the matter, you're not going to bother with the wheel. It's kind of a global universal wheel.
>>16705329that you're some breed of neurodivergent, either autistic, ADHD, or gifted.