Aleister Crowley (1875-1947) was an English occultist, poet, novelist and mountaineer who founded the religious philosophy of Thelema, based on The Book of the Law, a text he said was dictated to him in Cairo in 1904. Notorious in his lifetime and labeled by the press as a wicked man, he became one of the most influential figures in modern Western esotericism.
Aleister Crowley at a glance
| Born | October 12, 1875, Leamington Spa, England |
|---|---|
| Died | December 1, 1947, Hastings, England |
| Birth name | Edward Alexander Crowley |
| Known for | Founding Thelema; ceremonial magic ('magick') |
| Key works | The Book of the Law (1904), Book 4, The Book of Lies (1912), The Book of Thoth (1944) |
| Organizations | Hermetic Order of the Golden Dawn, A∴A∴, Ordo Templi Orientis |
Early life and education
Edward Alexander Crowley was born in Leamington Spa, Warwickshire, into a wealthy family whose fortune came from brewing. His parents belonged to the Plymouth Brethren, a strict evangelical Christian movement, and his later rebellion against that upbringing shaped much of his life and writing. After his father's death he inherited a substantial fortune, which funded years of travel, publishing and occult study.
He attended Trinity College, Cambridge, in the 1890s but left without taking a degree. At Cambridge he wrote poetry, took up chess and became a serious rock climber. He later took part in two major Himalayan expeditions: the 1902 attempt on K2 led by Oscar Eckenstein and the 1905 attempt on Kangchenjunga, which ended in a fatal accident and bitter disputes among the climbers.
The Golden Dawn and The Book of the Law
In 1898 Crowley was initiated into the Hermetic Order of the Golden Dawn, the London society that combined ceremonial magic, Kabbalah, astrology and tarot. He sided with Samuel Liddell MacGregor Mathers during the order's internal schism around 1900, and later broke with Mathers as well. He bought Boleskine House on the shore of Loch Ness, intending to perform the magical operation described in the Book of Abramelin, a text central to the idea of the Holy Guardian Angel.
In 1903 he married Rose Kelly. While the couple were in Cairo in 1904, Crowley wrote down the three chapters of Liber AL vel Legis, The Book of the Law, which he said was dictated over three days by a discarnate intelligence named Aiwass. The book proclaims a new aeon for humanity and contains the maxims "Do what thou wilt shall be the whole of the Law" and "Love is the law, love under will." Crowley at first set the text aside, but he later came to regard himself as the prophet of the religion it announced, which he called Thelema, from the Greek word for "will."
Orders, the Abbey of Thelema and later years
With George Cecil Jones, Crowley founded the A∴A∴, a teaching order whose graded curriculum he published in his periodical The Equinox (1909-1913 and later). He also joined the Ordo Templi Orientis (OTO), a German-founded fraternal order, headed its British branch and eventually became its international leader; the OTO adopted The Book of the Law as a central text. For the OTO he wrote the Gnostic Mass, still the order's main public rite.
In 1920 he established the "Abbey of Thelema" in a rented villa at Cefalù, Sicily, as a commune for his followers. After the death of a young disciple, Raoul Loveday, and a hostile British press campaign that called Crowley "the wickedest man in the world," the Italian government expelled him in 1923. His later years were marked by poverty, heroin addiction (initially from prescribed treatment for asthma and bronchitis) and a failed libel suit in 1934. From 1938 to 1943 he worked with the artist Frieda Harris on the Thoth tarot deck, explained in The Book of Thoth (1944). He died in a boarding house in Hastings in 1947.
Ideas and practice
Crowley spelled magic as "magick" to distinguish his system from stage conjuring, defining it as the science and art of causing change in conformity with will. Central to Thelema is the idea that every person has a True Will, a unique purpose, and that discovering and following it is the individual's highest duty. He drew freely on Hermeticism, Kabbalah, yoga, Buddhism and the work of Eliphas Levi, whom he believed to be a previous incarnation of himself.
His writings range from technical manuals such as Book 4 and the correspondence tables of Liber 777 to poetry, novels such as Moonchild and Diary of a Drug Fiend, and a long autobiography he called an "autohagiography." Critics and admirers alike note that his work mixes serious scholarship, deliberate provocation and humor, which makes it easy to misread.
Reputation and legacy
During his lifetime Crowley had relatively few followers and was widely condemned for his drug use, bisexuality, treatment of lovers and disciples, and self-styled title "the Great Beast 666." Biographers differ sharply: some portray him as a self-destructive egotist who harmed those around him, others as a talented and misunderstood religious innovator. Most agree he was both.
His posthumous influence has been large. He met Gerald Gardner shortly before his death, and Crowley's ritual language left traces in early Wicca. Thelemic organizations, including the OTO and several A∴A∴ lineages, remain active. In popular culture he appeared on the cover of the Beatles' Sgt. Pepper's Lonely Hearts Club Band, and Led Zeppelin guitarist Jimmy Page later owned Boleskine House. The Thoth deck remains one of the most widely used designs in modern tarot.
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Frequently asked questions
What is Thelema?
Thelema is the religious and philosophical system founded by Aleister Crowley on the basis of The Book of the Law (1904). Its central teaching is that each person has a True Will, and its core maxims are "Do what thou wilt shall be the whole of the Law" and "Love is the law, love under will." It is practiced today by the OTO and other groups.
Was Aleister Crowley a Satanist?
Crowley did not describe himself as a Satanist, and most historians do not classify him as one. He used provocative Christian imagery, such as calling himself the Beast 666 from the Book of Revelation, to reject his strict religious upbringing. His own system, Thelema, is a distinct religious philosophy centered on the True Will rather than on worship of Satan.
Who designed the Thoth tarot deck?
The Thoth tarot was conceived by Aleister Crowley and painted by the artist Lady Frieda Harris between 1938 and 1943. Crowley explained its symbolism in The Book of Thoth (1944). The deck was not published as printed cards until 1969, long after both of their deaths, and it has since become one of the most popular tarot decks in use.
Sources and further reading
This entry replaces an article from the original Mystica encyclopedia (online since 2001). It was rewritten from the sources above by The Mystica Editorial Team under our editorial standards. Last reviewed: September 30, 2026.