Genesis 9:19

Of them was the whole earth overspread. This passage declares in terse but unmistakable words that all later inhabitants of this globe are descendants of Noah’s three sons. Even if we are not able to trace every nation and tribe back to one of the heads of families enumerated in the following chapter, this text states emphatically that the whole earth was populated by Noah’s descendants. The view that certain races had been spared by the Flood in remote regions of this world, and had no direct relationship with Noah’s sons, is un-Scriptural.