>6000 years of continuous civilization>never produces glassWere they stupid?
> Were they stupid?Blacks (specifically Yorubans) could do it, so that's probably not the answer.
>>18514075https://www.sciencedirect.com/science/article/pii/S0305440317301851> The site of Igbo Olokun on the northern periphery of Ile-Ife has been recognized as a glass-working workshop for over a century. Its glass-encrusted crucibles and beads were viewed as evidence of secondary processing of imported glass until the high lime, high alumina (HLHA) composition of the glass was recognized as unique to the region.
>>6000 years of continuous civilizationWrong>>never produces glassWrong