Continuing onward:
Gen 11:1 Now the whole earth had one language and the same words.
Given that they were all related to the Noahs that is hardly surprising.
Gen 11:2 And as people migrated from the east, they found a plain in the land of Shinar and settled there.
Shinar is indeed east of Ararat.
Gen 11:3 And they said to one another, "Come, let us make bricks, and burn them thoroughly." And they had brick for stone, and bitumen for mortar.
Gen 11:4 Then they said, "Come, let us build ourselves a city and a tower with its top in the heavens, and let us make a name for ourselves, lest we be dispersed over the face of the whole earth."
Notice that they were earlier commanded to fill the whole Earth (Gen 9:1) And notice that Gen 10:32 speaks of this later diaspora.
Gen 11:5 And the LORD came down to see the city and the tower, which the children of man had built.
Gen 11:6 And the LORD said, "Behold, they are one people, and they have all one language, and this is only the beginning of what they will do. And nothing that they propose to do will now be impossible for them.
Gen 11:7 Come, let us go down and there confuse their language, so that they may not understand one another's speech."
Gen 11:8 So the LORD dispersed them from there over the face of all the earth, and they left off building the city.
Gen 11:9 Therefore its name was called Babel, because there the LORD confused the language of all the earth. And from there the LORD dispersed them over the face of all the earth.
The observation that mankind with one common language would be capable of great achievement is being born out today, as we become more and more able to mix and language barriers are diminishing............How could that have been foreseen thousands of years ago?
It is now obvious that the fruit if the tree of knowledge, ie. rebellion against God is still within the mouths and bellies of mankind. Indeed it is in our loins.
The Flood, though eradicating a lot of evil, did not, could not remove the sinful rebellious nature that we inherited from Adam.
Yet this is not in any way suggestive of a failure in God's program of redemption....it is just a chapter in the plan.
In the end, we see mankind left with no choice but to spread out and populate the Earth as commanded.