The great ancient civilization Sumer (progeny of Ham’s son Kush) of lower Mesopotamia during the Ice Age (when the Persian Gulf was land) turned to dust when the Ice Age ended (when too the ocean rose to cover the land where now is the Persian Gulf), that civilization ended, but the Akkadians to the north soldiered-on establishing the Assyrian Empire (progeny of Shem’s son Asshur) of the Fertile Crescent, the highlands of Mesopotamia where sufficient rain to sustain them continued though much reduced.