contributions to Thelema. Each has their own following within the broader Thelemic community. Jack Parsons John Whiteside Parsons (1914–1952) was an American rocket engineer, chemist, and Thelemite occultist. Parsons converted to Thelema, and together with his first wife, Helen Northrup, joined the Agape Lodge, the Californian branch of the Thelemite Ordo Templi Orientis (O.T.O.), in 1941. At Crowley's bidding, Parsons replaced Wilfred Talbot Smith as its leader in 1942 and ran the Lodge from his mansion on Orange Grove Boulevard. Parsons identified four obstacles that prevented humans from achieving and performing their True Will, all of which he connected with fear: the fear of incompetence, the fear of the opinion of others, the fear of hurting others, and the fear of insecurity. He insisted that these must be overcome, writing that "The Will must be freed of its fetters. The ruthless examination and destruction of taboos, complexes, frustrations, dislikes, fears and disgusts hostile to the Will is essential to progress." Parsons conducted the Babalon Working, a magical working intended to invoke the Thelemic goddess Babalon on Earth via a series of ceremonial magic rituals performed from January to March 1946 by Jack Parsons and Scientology founder L. Ron Hubbard. This ritual was essentially designed to manifest an individual incarnation of the archetypal divine feminine called Babalon. The project was based on the ideas of Crowley, and his description of a similar project in his 1917 novel Moonchild. The rituals performed drew largely upon rituals and sex magic described by Crowley. Crowley was in correspondence with Parsons during the course of the Babalon Working, and warned Parsons of his potential overreactions to the magic he was performing, while simultaneously deriding Parsons' work to others. A brief text entitled Liber 49, self-referenced within the text as The Book of Babalon, was written by Jack Parsons as a transmission from the goddess or force called 'Babalon' received by him during the Babalon Working. Parsons wrote that Liber 49 constituted a fourth chapter of Crowley's Liber AL Vel Legis (The Book of the Law), the holy text of Thelema. Kenneth Grant Kenneth Grant (1924–2011) was an English ceremonial magician and advocate of the Thelemic religion. A poet, novelist, and writer, he founded his own Thelemic organisation, the Typhonian Ordo Templi Orientis—later renamed the Typhonian Order—with his wife Steffi Grant. Grant drew eclectically on a range of sources in devising his teachings. Although based in