"They assert that 75 million years ago, an evil galactic warlord named Xenu controlled seventy-six planets in this corner of the galaxy, each of which was severely overpopulated. To solve this problem, Xenu rounded up 13.5 trillion beings and then flew them to Earth, where they were dumped into volcanoes around the globe and vaporized with bombs. This scattered their radioactive souls, or thetans, until they were caught in electronic traps set up around the atmosphere and "implanted" with a number of false ideas -- including the concepts of God, Christ and organized religion. Scientologists later learn that many of these entities attached themselves to human beings, where they remain to this day, creating not just the root of all of our emotional and physical problems but the root of all problems of the modern world."
"Scientology's "Technical Dictionary" makes reference to a number of extraterrestrial "invader forces," including one, the "Marcab Confederacy," explained as a vast, interplanetary civilization more than 200,000 years old that "looks almost exact duplicate [sic] but is worse off than the current U.S. civilization." Indeed, as even Rinder himself points out, Hubbard presented a rough outline of the Xenu story to his followers in a 1967 taped lecture, "RJ 67," in which he noted that 75 million years ago a cataclysmic event happened in this sector of the galaxy that has caused negative effects for everyone since."
id just like to say im going scientologist, the above really persuaded me.