This is why the negro is black

“But the people, who underdeveloped their »I«-being [their »ego«], who were exposed too much to the effects of the sun, they were like plants: they deposited under their skin too many carbon-like elements and became black. This is why the negro is black.” (Rudolf Steiner)

Source: Rudolf Steiner, “Geisteswissenschaftliche Menschenkunde”, (GA107), page 7