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Yes. All humans were once adapted to life in Africa where all our distant ancestors used to live. Protection from UV-light is important, although pigmentation has costs. As groups of humans migrated from Africa to colder areas with less sun they needed more clothes for warmth. Since sunlight is needed to convert cholesterol into vitamin D3 there was a selection pressure for pigmentation to lessen among these populations. At the same time the selection to maintain pigmentation to protect against UV-light was reduced.

The blond extremes are (originally) found in northern Europe and on the British isles. Areas withvery little sunlight due to a northern location and the massive onslaught of clouds from the Atlantic weather systems.

The genetic diversity is still largest in Africa, meaning the two most distantly related humans today are both living in Africa.

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