Now these are the generations of the sons of Noah, Shem, Ham, and Japheth: and unto them were sons born after the flood.
All Commentaries on Genesis 10:1 Go To Genesis 10
Augustine of Hippo
AD 430
In the same book [of Genesis], when the generations of the sons of Noah are recalled to our minds, we read, “These are the children of Ham in their tribes according to their tongues, in their lands and nations.” Also, in enumerating the sons of Shem, it is said, “These are the children of Shem in their tribes according to their tongues, in their lands and nations.” And this is added in reference to all of them: “These are the tribes of the sons of Noah, according to their generations and according to their nations. From these were the islands of the nations scattered over the earth after the flood. And the whole earth was one tongue, and there was one speech for all.” And so, because this sentence was added: “And the earth was one tongue and there was one speech for all” (that is, one language for them all), it could be inferred that at that time, when human beings had been scattered according to the islands of the nations over the earth, there was one language common to all of them. Without a doubt, this contradicts the words used above, “according to their tribes and tongues.” For, each single tribe that had formed individual nations would not be said to have had its own tongue when there was a common one for all. So it is by way of recapitulation that there is added: “And the earth was one tongue, and there was one speech for all.” The narrative, without mentioning it, goes back to tell how it came about that the one language common to all men was broken up into many tongues. And immediately we are told about the building of the tower, when this punishment for their pride was inflicted upon them by the divine judgment. After this event they were scattered over the earth according to their languages. .