The religion known as Thelema was founded in 1904 by the English poet and mystic Aleister Crowley (1875 - 1947), who is regarded as its prophet. Those who follow the path of Thelema are called Thelemites.

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Enyo's note: While I'm no expert on Thelema, an online friend who knows more about it than I do considers it "fairly decent". And he has high standards. So, enjoy!