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This was suggested in the 10,000 Explosion. Pale skin did not become advantageous until the spread of agriculture, since hunter gatherers got enough vitamins from their diet, processing Vit D from sunlight not important http://www.telegraph.co.uk/science/2018/02/07/first-britons-black-natural-history-museum-dna-study-reveals/ …
Genes that increase probability of blond hair and blue eyes have been under selection in the English just in last 2,000 years. Height and head circumference(!) have also gone up. https://www.biorxiv.org/content/early/2016/05/07/052084 …
