Bryan McAllister’s personal reference notebook
September 11, 2026Short & citedBlog
Civic Viewpoint.
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Everyday Life • Occultist

Aleister Crowley

Aleister Crowley was a British occultist, writer, and mountaineer best known for founding the religion and philosophy of Thelema and for popularizing the spelling "magick" for ritual practice.

Updated September 11, 20261 min readCited sources

Aleister Crowley was a British occultist, writer, and mountaineer who founded the religion and philosophy of Thelema. He remains one of the most controversial and influential figures in esoteric history.

Who he was

Born Edward Alexander Crowley in 1875 in Royal Leamington Spa, England, he later adopted the name Aleister. He was a British occultist, writer, and mountaineer, and died in Hastings in 1947.

What he founded

Crowley founded Thelema, a spiritual system centered on individual will. He popularized the spelling "magick" to distinguish ritual practice from stage magic. He was associated with the Hermetic Order of the Golden Dawn, co-founded the A∴A∴, and led the Ordo Templi Orientis.

Why he remains notable

Denounced in his lifetime for his lifestyle and beliefs, Crowley had few followers then but became a major cult figure after death. His writings on occultism continue to influence esoteric traditions and popular culture.

In short

  • British occultist who founded Thelema.
  • Used "magick" for ritual practice.
  • Associated with Golden Dawn, A∴A∴, O.T.O.
  • Controversial in life, iconic after death.
Canadian angle

Crowley’s influence appears in Canadian readers’ interest in occult history, esoteric literature, and popular culture, especially through later music, art, and alternative spirituality references.

Quick questions

Who was Aleister Crowley?
He was a British occultist, writer, and mountaineer who founded Thelema and became one of the most controversial esoteric figures of the 20th century.
What is Thelema?
Thelema is Crowley’s religious and philosophical system, centered on the idea of discovering and following one’s true will.
Why was Crowley controversial?
He was denounced in his own time for his beliefs and decadent lifestyle, and his public reputation was highly contentious.

Sources

  1. Encyclopaedia Britannica — https://www.britannica.com/biography/Aleister-Crowley
    Supports: Birth, death, nationality, occupations, notoriety, and posthumous reputation.
  2. Wikipedia — https://en.wikipedia.org/wiki/Aleister_Crowley
    Supports: Co-founding of the A∴A∴ in 1907 and propagation of Thelema.
  3. EBSCO — https://www.ebsco.com/research-starters/history/aleister-crowley
    Supports: Overview of Crowley as British occultist, founding Thelema, and key biographical facts.