So, people originated in the Rift Valley in Africa, traveled north and settled the Near East, then migrated west by sea and north west by land. So far we have the same pool of humans travelling via different routes. Then we have the west and southern migrations that brought the Dorian tribes to Greece etc. So where is the difference between all these people if they all originated from the Rift Valley?
Is there some evidence to support the view that GR puts forth that the Near Easterners were somehow different or superior?
And one more fact that is more certain than these anthropological conjectural theories. Up to the Middle Ages navigation was coastal navigation, carried out mostly in daylight and within sight of land. The idea that early seafarers sailed directly from Cyprus to Crete is no go. They went along the shore they could see, the same way that the later migration went from Greece to Cyprus. The distance observer to horizon at sea is nine miles.