Some thoughts I wanted to share

[Eskorbutin]

I looked up the statistics, black kids in the US have slower cognitive development (and never catch up), which the study of course attributed to social factors without any evidence, and they had faster motor development! I suspect this means their brains are slower at learning high-level concepts, because the low-level structures are optimized for a shorter time. But they will keep the lead in motor development, because it is easier to learn, and they have more time and attention to practice once they get the structures in place.

It could also be that they have an additional set of learning directives in place that adapts them better to a more hunting/running style of life, whereas the Europeans had to adapt for identifying long-term seasonal patterns, delayed gratification for agriculture etc.