Actually, you aren't far off. That's pretty much what scientology says. from
Wikipedia "In Scientology doctrine, Xenu is a galactic ruler who, 75 million years ago, brought billions of people to Earth, stacked them around volcanoes, and blew them up with hydrogen bombs. Their souls then clustered together and stuck to the bodies of the living, and continue to cause people problems today. These events are known to Scientologists as "Incident II," and the traumatic memories associated with them as The Wall of Fire or the R6 implant."