Is One Hair Type Better Than Another?

Why does hair vary so much with people? Does coarse hair or kinky hair have an advantage over fine hair?

I remember a television piece done by CBS News’ 60 Minutes where they tracked what was claimed to be one of the original 12 tribes of Israel deep into the African continent through genetic testing on the Y Chromosome. In the few thousand years since the migration, the physical characteristics of the African became evident in these people with bigger lips, a wider nose, and kinky hair. I think that thermal regulation has a lot to do with the kinky hair, which allowed better cooling as a person chased an animal in the savannas of Africa during the hunt. Wide nasal passages allowed better air movement for breathing as well. The scalp is a major releaser of heat by preventing overheating in the summer, especially when heat generation adds to climatic conditions. On the other side, we know that when the French invaded Russia in Napoleon times, the winter killed more Frenchman than the battles. We also know that the bald men died during the retreat at a much higher rate than those with a full head of hair. Conservation of our body heat in the cold is another function of hair. In your question, you suggest that there is a better hair type; but better for what? Those with thin hair that sticks to a sweaty scalp may insulate better than a person with kinky hair, but not with coarse hair that lies flat. Also, there are no kinky-haired people outside of the original African population, indicating that kinky hair had an evolutionary advantage, so it evolved as the people adapted better to their geography and climate. If everyone originated out of the middle east, then we should look to our cousins there to see where we may have started from. This could be interesting topics of conversation for those of us who believe that one type of hair/person is better than another. When we put esthetics into the formulae for your question, then culture and vanity act as modifiers that go well beyond the influences of climate. Thanks for the insightful question. I always enjoy the wide variety of questions posed in this blog.