Quote Originally Posted by Max_Killjoy View Post
So what seems better as a starting point, before the Choumin / Storm People established their empire? A single overall phenotype with different cultures spread out across the islands, or multiple phenotypes partially matched with the different cultures/subcultures?
Why not both? The central culture split among the islands, each going its own way before the traders came to prominence, but the trade empire kept growing in every direction they could, encountering subcultures of other genetic groups isolated from their core.