Is it possible that Europe, Africa, and Asia (the "original" three continents) could each practice, almost in entirety, an Abrahamic faith of their own?
An unlikely example to show what I mean: Christians go east into Asia and convert it. Hellenistic Jews convert the Roman Empire and the rest of Europe. And Berbers create an alternate third Abrahamic faith which spreads south to the rest of Africa.
That one's just for illustration but is it possible for something like that to happen?