Stories of extraterrestrial civilizations and interventions in past lives form a part of the belief system of Scientology.
Scientology’s founder, L. Ron Hubbard, published a number of books, lectures and other works describing what he termed “space opera”. Xenu, the ruler of the Galactic Confederacy who is said to have brought billions of frozen people to Earth 75 million years ago and placed them near a number of volcanoes, and dropped hydrogen bombs into them, thus killing the entire population in an effort to solve overpopulation. The spirits of these people were then captured by Xenu and mass implanted with numerous suggestions and then “packaged” into clusters of spirits.
According to Hubbard, when thetans (the Scientology term for a human being) die they go to a “landing station” on the planet Venus, where they are re-implanted and are programmed to “forget” their previous lifetimes, thus causing amnesia. The Venusians then “capsule” each thetan and send them back to Earth to be dumped into the ocean off the coast of California, whereupon each thetan searches for a new body to inhabit. To avoid these inconveniences, Hubbard advised Scientologists to simply refuse to go to Venus after their death.
Scientology teaches that all humans have experienced innumerable past lives, including lives in ancient advanced extraterrestrial societies such as Helatrobus and the Marcabians. Traumatic memories from these past lives are said to be the cause of many present-day physical and mental ailments. Scientologists also believe that human beings possess superhuman powers which cannot be restored until they have been fully rehabilitated as spiritual beings through the practice of “auditing”, using methods set out by Hubbard in his various works.