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Here's a link to an enlightening interview with Ahati Kilindi Iyi, an elder in African Martial Sciences. He discusses everything from the history of martial arts, addictions, marijuana, power plants, shamanism, spiritual realms, alchemy, levels of consciousness and maturity, hyper dimensional martial arts training, "downloading" martial arts (ala Matrix).
He's an American raised in Brooklyn, and gives an overview of martial arts and sciences that is extremely wide and deep in scope.