Instead, the fairer form of SLC24A5 is associated with people's languages, specific geographic areas, and ancestry. For example, Brahmins, no matter where they're from in India, tend to have allele A. Another example: In one South Indian group, the Saurashtrians, 70 percent of people have allele A. It's believed Saurashtrians moved south from a more northern region during the Middle Ages, when Southern Indian kings invited them to the area for their silk weaving skill. All of this contrasts with SLC24A5 in Europeans, in whom allele A is nearly ubiquitous, and appears almost entirely driven by evolution.