Women kick the sand from their slippers, and ease into the cool comfort of a natural hair and skincare store in central Dakar. On the shelves are jars filled with handmade supplements of organic shea butter, coconut, castor and olive oils, sourced from across west Africa. In floral silk hijabs and abaya dresses, the women sit on sofas near the back of the store, discussing their hair beneath a mural of poised black women and men, wearing a...