Dion Fortune (1891-1946), founder of The Society of the Inner Light, is recognised as one of the most luminous figures of twentieth-century esoteric thought. A prolific writer, pioneer psychologist, powerful psychic and spiritualist, she dedicated her life to the revival of the Western Mystery Tradition. She was a member of the Order of the Golden Dawn, whose members included at various times such people as A.E. Waite, Aleister Crowley, and W. B. Yeats.