Church of Scientology founder L. Ron Hubbard included space opera narratives in his writings, wherein thetans (the name given to human souls) were reincarnated periodically over quadrillions of years, retaining memories of prior lives, to which Hubbard attributed complex narratives about life throughout the universe. The most controversial of these myths is the story of Xenu, to whom Hubbard attributed responsibility for many of the world's problems.
Some space opera doctrines of Scientology are only provided by the church to experienced members, who church leaders maintain are the only ones able to correctly understand them. Several former members of the church have exposed these secret documents, leading to lengthy court battles with the church, which failed to keep the secret. Critics of the church have noted that some of the narratives are scientifically impossible, and have thus assailed the church as untrustworthy for teaching them. The space opera teachings have also been satirized in popular culture. Scholars of religion have described the space opera narratives as a creation myth designed to encourage reverence of Hubbard as a supreme messenger. Several academics have drawn attention to the similarity of the space opera myths to themes of the 1950s Cold War culture in which they were constructed.
(It should be noted that although this article regularly refers to Xenu, Hubbard in many of his lectures and writings actually uses the name Xemu).
L. Ron Hubbard created a form of therapy known as Dianetics, which he promoted as a scientific, not religious, teaching. Until the early 1950s, he had a negative view of organized religions, but thereafter discussed spiritual topics. In these teachings, he identified subconscious memories of past events, which he called "engrams", as causes of human dissatisfaction. By 1950, he had begun to ponder past lives, believing that they could be recalled; he attempted to use these recollections to develop a comprehensive narrative of the universe. He founded the Church of Scientology in 1953, advancing his beliefs as religious doctrines. The church was distinct from Dianetics-based groups but incorporated some of their views. Hubbard saw Dianetics as focused on the physical body but viewed Scientology as a way to address spiritual matters.