It goes on all over the world. Many black people suffer even worse from hair breakage because the hair follicles are crescent-shaped and the hair shaft emerges shaped a bit like a stick of celery, meaning that, like a finger nail (same keratin) it tends to curve around and become coiled up. Tightly-coiled hair is brittle thanks to the shape and difficult to grow long and you should see the numbers of "treatment" products that are sold to black people; in fact the Afro haircare industry runs on the mantra that once you've sold a customer a perm treatment (at a competitive price) to straighten their hair, so much chemical damage is caused that you make your fortune out of selling them the "repair" products that they think they need. These range from simple petroleum jelly mixed with mineral oil and all kinds of spurious additives like aloe vera and vitamin E, to "pink oil" moisturiser, which is a simple emulsion of oil and water with a strong colour and perfume and more spurious additives. I have a Nigerian friend who has become fabulously wealthy by doing just that; converting shiploads of cheap industrial commodities into something with added value and selling it for a huge profit. To the dismay of the Afro haircare industry, hairpiece manufacturers from the Far-East have cornered the market and the smart African woman about town is now far more likely to cut her hair very short and wear a hairpiece while her male colleague is likely to shave his head completely, meaning that niether requires the overpriced maintenance products.