Nikola Tesla had one of the greatest minds the world has ever seen. He developed the alternating current system as well as the Tesla coil and made some absolutely incredible advances in early wireless communication.
That mind, though, was also plagued with madness. Tesla has been called eccentric, but that hardly scratches the surface of his problems. He was, by all modern definitions, cripplingly mentally ill. Behind his genius was a man who struggled through intense delusions and compulsive behavior, a man tormented by his own mind.