Clearly some types of history lend themselves very well to oral preservation. Religious texts and certain types of history come to mind. I very much doubt thou

Clearly some types of history lend themselves very well to oral preservation. Religious texts and certain types of history come to mind. I very much doubt though that ALL types of history would be good for that, let alone other types of information. Not a lot of dry econometrics textbooks lend themselves to rote memorization for example.