Aleister Crowley

Aleister Crowley (born Edward Alexander Crowley; 12 October 1875 – 1 December 1947) was an English occultist, ceremonial magician, poet, novelist, mountaineer, and painter. As the founder of the religion of Thelema in the early 20th century, he identified as its prophet, entrusted with guiding humanity into the Æon of Horus. A prolific writer, he published widely—composing the "Libri" of Thelema—over the course of his life.

Born to a wealthy family in Royal Leamington Spa, Warwickshire, Crowley rejected his parents' Plymouth Brethren faith to pursue an interest in Western esotericism. He was educated at Trinity College at the University of Cambridge, where he focused his attention upon mountaineering and poetry, resulting in several publications. Some biographers allege that here he was recruited into a British intelligence agency, further suggesting that he remained a spy throughout his life. In 1898, he joined the esoteric Hermetic Order of the Golden Dawn, where he was trained in ceremonial magic by Samuel Liddell MacGregor Mathers and Allan Bennett. He went mountaineering in Mexico with Oscar Eckenstein, before studying Hindu and Buddhist practices in India. In 1904, he married Rose Edith Kelly, and they honeymooned in Cairo, Egypt, where Crowley wrote down The Book of the Law—a sacred text that serves as the basis for Thelema, which he said had been dictated to him by a supernatural entity named Aiwass. The Book announced the start of the Æon of Horus and declared that its followers should "Do what thou wilt": seek to align themselves with their True Will via the practice of ceremonial magic.

After the unsuccessful 1905 Kanchenjunga expedition and a visit to India and China, Crowley returned to the United Kingdom, where he attracted attention as a prolific author of poetry, novels, and occult literature. In 1907, he and George Cecil Jones co-founded an esoteric order—the A∴A∴, through which they propagated Thelema. After spending time in Algeria, in 1912 he was initiated into another esoteric order, the German-based Ordo Templi Orientis (O.T.O.); he rose to become the leader of its British branch, which he reformulated in accordance with Thelema. Through O.T.O., Thelemite groups were established in Britain, Australia, and North America. Crowley spent the First World War in the United States, where he took up painting, and campaigned for the German war effort against Britain. His biographers later revealed that he had infiltrated the pro-German movement to assist the British intelligence services. In 1920, he established the Abbey of Thelema, a religious commune in Cefalù, Sicily, where he lived with various followers. His libertine lifestyle led to denunciations in the British press, and the Italian government evicted him in 1923. He divided the following two decades among France, Germany and England, and continued to promote Thelema until his death.

Crowley gained widespread notoriety during his lifetime, being a drug user, a bisexual and an individualistic social critic. Crowley has remained a highly influential figure over western esotericism and the counterculture of the 1960s, and he continues to be considered a prophet in Thelema. He is the subject of various biographies and academic studies.