FF7Guru
pro gamer dude. no messin'.
An Aztec legend said that there was different "Ages" of humans, and that only 2 humans survived at the end of each age. Maybe we can apply that kind of theory to this, as not all people know everything, and knowledge would change with each age. EG the Fayth wouldn't work anymore because no-one knew how to use it, and someone found a piece of materia, or vice versa?