Aleister Crowley (/ˈkroʊli/; born Edward Alexander Crowley; 12 October 1875 – 1 December 1947) was an English occultist, ceremonial magician, poet, painter, novelist, and mountaineer. He founded the religion and philosophy of Thelema, identifying himself as the prophet entrusted with guiding humanity into the Æon of Horus in the early 20th century.