Dear Andy Serkis: Hobbits aren't real. Nowhere in the Lord of the Rings did Tolkien say "every single hobbit in the Shire is white." Also, if he did, hobbits aren't real. It won't destroy your story, which again, is fiction, to have some Black and Brown hobbits. Sincerely, Sheryl
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Not even historically accurate, if you take LoTR as proxy for "long long ago." We know the ancient inhabitants of what's now Britain, having recently migrated, retained darker skin and blue eyes for several millennia. Paler skin is a very recent development. www.smithsonianmag.com/smart-news/a...
It's not that complicated. Near equator, lots of sunlight, natural selection will favor survival of darker skinned people as a protection against UVB destroying folate. But further away from equator, selection favors lighter skins for Vitamin D to avoid rickets. www.ncbi.nlm.nih.gov/books/NBK210...
Given ancient survival rates, whereas the theoretically shortest time it would take an isolated population to lose UVB melanin protection in higher latitudes is around 2,500 years, actual Euro experience is that it took longer overall: 3-to-5 thousand years. www.science.org/content/arti...
The nutrition argument is although some genes for lighter skin emerged in archaic Euros up to 40K years ago, they never became dominant & pop stayed darker skinned until immigration of farmers, w/ high calorie, poorer nutrition diets & rapid selection pressure. pmc.ncbi.nlm.nih.gov/articles/PMC...