>>13578068No. For a few reasons.
The first being that melanin is a trade-off. More means higher vitamin D absorption, but higher heat stresses as a result, and visa-versa. Caucazoid and Mongoloid diaspora -- do to their roaming nature after leaving Africa -- where constantly shaped by their environment. Greater seasonal shifting, novel landscapes, glaciation and other factors forced these group to select for intelligence above all else. The results of which yielded greater coordination, hunting skills, architecture, and agriculture. Do to access to more nutritional foods, higher melanin now poses more detriment that asset. Over time, these group start selecting for lower melanin, thus reducing heat stress from the sun, while still maintaining efficient amounts of vitamin D.
Also, do to our techno environment and modern medicine, we humans have little to no selective pressures left. This means our evolutionary path is subject to complete entropy; as no meaningful traits are selected, other that the mundane. This is why eugenics was hot-button topic in the late 19th and early 20th century. As long as we remain in our current environment, dark-skinned people will likely never loose their melanin.
The particular irony of all this is that skin color is -- but not always -- a strong indicator of an ethnicities intelligence.
