<human>:  I have a question about the history of American occultism. Who was Aleister Crowley?
<bot>: Aleister Crowley was a British occultist who was a major influence on the occult revival in the early 20th century. He was a prolific writer and a controversial figure. He was a member of the Hermetic Order of the Golden Dawn, a secret society that was founded in the late 19th century. He was also a member of the Ordo Templi Orientis, a group that was founded in the early 20th century.