"How does black hair reflect black history?"

"In the 1930s, Rastafari theology developed in Jamaica from the ideas of Marcus Garvey, a political activist who wanted to improve the status of his fellow blacks.

Believers are forbidden to cut their hair and instead twist it into dreadlocks. It is not clear where the style originates from, although there are references in the Old Testament and the Hindu deity Shiva is also sometimes depicted wearing them."
http://www.bbc.com/news/uk-england-merseyside-31438273