Erm Freud's hypothesis is that this religion left Egypt because of the persecution, Moses was one of Akhenaten's followers who went out into the desert, erm here as I'll explain in the lectures er some of my own research opens up a new angle on this that Freud didn't know about and why they went out into the desert, why they picked up these er Hebrew erm er immigrants who were living on the fringes of the Egyptian Empire.