"Classical racial traits (skin color, hair color, nose form, etc.) are adaptations to local climates."
But in historical times, blondes with nice noses have had a reproductive advantage. Among American blacks today, those with lighter skin do.
But in historical times, blondes with nice noses have had a reproductive advantage. Among American blacks today, those with lighter skin do.
My comments reflect earlier time periods, when people migrated slowly (i.e., pre-sailing ship and excluding organized warfare--Genghis Khan and the like).
That way there is plenty of time for adaptations as you go along.