What connection did Aleister Crowley have with the Golden Dawn?
Aleister Crowley, the most renowned magic practitioner and theoretician of the twentieth century, was initiated into the Hermetic Order of the Golden Dawn in 1898, introduced by George Cecil Jones. He was befriended by Mathers, whom he eventually betrayed, nearly destroying the Golden Dawn by publishing its secret rituals and teachings. Having left the Golden Dawn, in 1907 Crowley founded his own order, the Argentum Astrum (AA; Silver Star). He later went on to become the head of the Ordo Templi Orientis (O.T.O.).