I was a big fan of the whole “Lost Continent of Mu” thing as a teenager. There was a series of books by one Colonel James Churchward (I think he was called) purporting to lay out the evidence for one global antedeluvian civilization that inspired all subsequent cultures. I guess it’s possible.
I remember reading that the history of Mu was written as a part of the Greek alphabet (or something along those lines). It’s been a looong time...