Question: What type of church did this American author found who claimed the ideas of Dianetics originated in the 1920s and 1930s?

full_context: Document 1: L. Ron Hubbard House: The L. Ron Hubbard House, also known as the Original Founding Church of Scientology, is a writer's house museum and former Scientology church located at 1812 19th Street NW in the Dupont Circle neighborhood of Washington, D.C., United States. The home served as the residence of Scientology founder L. Ron Hubbard from 1955 until 1959, during which time he incorporated the Founding Church of Scientology and performed the first Scientology wedding. The building is a contributing property to the Dupont Circle Historic District, a neighborhood listed on the National Register of Historic Places.
Document 2: Written works of L. Ron Hubbard: Lafayette Ronald Hubbard (March 13, 1911 – January 24, 1986), better known as L. Ron Hubbard, was an American pulp fiction author. He wrote in a wide variety of genres, including science fiction, fantasy, adventure fiction, aviation, travel, mystery, western and romance. He is perhaps best known for his self-help book, the #1 New York Times bestseller Dianetics: The Modern Science of Mental Health (first published in 1950), and as the founder of the Church of Scientology.
Document 3: History of Dianetics: The history of Dianetics possibly begins in the 1920s. Its originator L. Ron Hubbard claimed that his ideas of Dianetics originated in the 1920s and 1930s. By his own account, he spent a great deal of time in the Oak Knoll Naval Hospital's library, where he would have encountered the work of Freud and other psychoanalysts. In April 1950, Hubbard and several others established the Hubbard Dianetic Research Foundation in Elizabeth, New Jersey to coordinate work related for the forthcoming publication. Hubbard first introduced Dianetics to the public in the article "" published in the May 1950 issue of the magazine "Astounding Science Fiction". Hubbard wrote "" at that time, allegedly completing the 180,000-word book in six weeks.
Document 4: History of public relations: Most textbooks date the establishment of the "Publicity Bureau" in 1900 as the start of the modern public relations (PR) profession. Of course, there were many early forms of public influence and communications management in history. Basil Clark is considered the founder of the public relations profession in Britain with his establishment of Editorial Services in 1924. Academic Noel Turnball points out that systematic PR was employed in Britain first by religious evangelicals and Victorian reformers, especially opponents of slavery. In each case the early promoters focused on their particular movement and were not for hire more generally.
Document 5: Scientology and racism: Scientology founder L. Ron Hubbard has been accused of harboring racist views; in a letter to his first wife, Polly Grubb, Hubbard wrote "You shouldn’t be scrubbing the floor on your hands and knees. Get yourself a nigger; that’s what they’re born for." Hubbard also strongly defended the apartheid system in South Africa and reportedly considered founding his own all-white colony on the continent. He also spoke ill of Asians, saying "The trouble with China is, there are too many chinks here".
Document 6: L. Ron Hubbard: Lafayette Ronald Hubbard (March 13, 1911 – January 24, 1986), better known as L. Ron Hubbard ( ) and often referred to by his initials, LRH, was an American author and the founder of the Church of Scientology. After establishing a career as a writer, becoming best known for his science fiction and fantasy stories, he developed a system called Dianetics which was first expounded in book form in May 1950. He subsequently developed his ideas into a wide-ranging set of doctrines and practices as part of a new religious movement that he called Scientology. His writings became the guiding texts for the Church of Scientology and a number of affiliated organizations that address such diverse topics as business administration, literacy and drug rehabilitation. The Church's dissemination of these materials led to Hubbard being listed by the "Guinness Book of World Records" as the most translated and published author in the world. The Guinness World Record for the most audio books published for one author is also held by Hubbard. In 2014, Hubbard was cited by "Smithsonian" magazine as one of the 100 most significant Americans of all time, as one of the eleven religious figures on that list.
Document 7: Scientology in the United Kingdom: Scientology in the United Kingdom is practised mainly within the Church of Scientology and its related groups which go under names including "Hubbard Academy of Personal Independence" and "Dianetics and Scientology Life Improvement Centre". The national headquarters, and former global headquarters, is Saint Hill Manor at East Grinstead, which for seven years was the home of L. Ron Hubbard, the pulp fiction author who created Scientology. Church-connected groups promoting aspects of L. Ron Hubbard's teaching, including Narconon and CCHR, have also been active in the UK, in some cases with charitable status. There have also been groups practising Scientology independently of the Church.
Document 8: Bare-faced Messiah: Bare-faced Messiah: The True Story of L. Ron Hubbard is a posthumous biography of Scientology founder L. Ron Hubbard by British journalist Russell Miller. First published in the United Kingdom on 26 October 1987, the book takes a critical perspective, challenging the Church of Scientology's account of Hubbard's life and work. It quotes extensively from official documents acquired using the Freedom of Information Act and from Hubbard's personal papers, which were obtained via a defector from the Church. It was also published in Australia, Canada and the United States.
Document 9: L. Ron Hubbard, Messiah or Madman?: L. Ron Hubbard, Messiah or Madman?, is a posthumous biography of Scientology founder L. Ron Hubbard written by Bent Corydon, which makes extensive use of interviews he conducted with Hubbard's son Ronald DeWolf. Though originally published in 1987 by Lyle Stuart Inc., the book was re-issued in a paperback edition on July 25, 1992 and a hardcover edition in October 1995, both by publisher Barricade Books. The 1995 edition also featured Brian Ambry as principal researcher. The first edition of the book listed DeWolf as coauthor.
Document 10: A Piece of Blue Sky: A Piece of Blue Sky: Scientology, Dianetics and L. Ron Hubbard Exposed is a 1990 book about L. Ron Hubbard and the development of Dianetics and the Church of Scientology by British former Scientologist Jon Atack. The title originates from a quote of Hubbard's from 1950, when he was reported as saying that he wanted to sell potential church members a "piece of blue sky."
Document 11: Margaret Grubb: Margaret Louise "Polly" Grubb (September 22, 1907 – November 17, 1963) was the first wife of pulp fiction author and Scientology founder L. Ron Hubbard, to whom she was married between 1933 and 1947. She was the mother of Hubbard's first son, L. Ron Hubbard, Jr. and his first daughter, Katherine May "Kay" Hubbard.
Document 12: Church of Scientology: The Church of Scientology is a multinational network and hierarchy of numerous ostensibly independent but interconnected corporate entities and other organizations devoted to the practice, administration and dissemination of Scientology, a new religious movement. The Church of Scientology International (CSI) is officially the Church of Scientology's parent organization, and is responsible for guiding local Scientology churches. At a local level, every church is a separate corporate entity set up as a licensed franchise and has its own board of directors and executives. The first Scientology church was incorporated in December 1953 in Camden, New Jersey by L. Ron Hubbard. Its international headquarters are located at the Gold Base, in an unincorporated area of Riverside County, California. The location at Gilman Hotsprings is private property and not accessible by the public. Scientology Missions International is under CSI and oversees Scientology missions, which are local Scientology organizations smaller than churches. The Church of Spiritual Technology (CST) is the organization which owns all the copyrights of the estate of L. Ron Hubbard.
Document 13: Hubbard College of Administration International: Hubbard College of Administration International is an unaccredited school that teaches administration using methods developed by Church of Scientology founder, L. Ron Hubbard. The headquarters for the school is located at 320 North Vermont Avenue, Los Angeles, California 90004. The school began operations in 1990 and its current headquarters were established in 2001. It is a 501(c)(3) public charity, and as a religious organization does not file an annual return, however it states itself to be a "secular educational institution".
Document 14: Scientology: Scientology is a body of religious beliefs and practices developed in 1954 by American author L. Ron Hubbard (1911–86). Hubbard initially developed a program of ideas called Dianetics, which was distributed through the Dianetics Foundation. The foundation soon entered bankruptcy, and Hubbard lost the rights to his seminal publication "" in 1952. He then recharacterized the subject as a religion and renamed it Scientology, retaining the terminology, doctrines, the E-meter, and the practice of auditing. Within a year, he regained the rights to Dianetics and retained both subjects under the umbrella of the Church of Scientology.
Document 15: L. Ron Hubbard: Lafayette Ronald Hubbard (March 13, 1911 – January 24, 1986), better known as L. Ron Hubbard ( ) and often referred to by his initials, LRH, was an American author and the founder of the Church of Scientology. After establishing a career as a writer, becoming best known for his science fiction and fantasy stories, he developed a system called Dianetics which was first expounded in book form in May 1950. He subsequently developed his ideas into a wide-ranging set of doctrines and practices as part of a new religious movement that he called Scientology. His writings became the guiding texts for the Church of Scientology and a number of affiliated organizations that address such diverse topics as business administration, literacy and drug rehabilitation. The Church's dissemination of these materials led to Hubbard being listed by the "Guinness Book of World Records" as the most translated and published author in the world. The Guinness World Record for the most audio books published for one author is also held by Hubbard. In 2014, Hubbard was cited by "Smithsonian" magazine as one of the 100 most significant Americans of all time, as one of the eleven religious figures on that list.
ground_truth: Church of Scientology