Aleister Crowley, the greatest Magus of the twentieth century, redefined the very basis of the Western Esoteric Tradition. His incalculably vast influence reaches through all modern occultism. Whether acknowledged or not, he is the father of the modern arts of ceremonial magick, western tantra, tarot and wicca. His devotees ascribe even greater significance to his life, regarding him as the Prophet of the Modern Age.