The whole earth had one language. As people migrate eastward, they find a plain in the land of Shinar and settle there. They make baked bricks and use bitumen for mortar, and say: let us build a city and a tower whose top reaches the heavens, and let us make a name for ourselves, lest we be scattered over the face of the whole earth.
The Lord comes down to see the city and the tower. He observes that they are one people with one language, and that nothing they plan will be impossible for them. So he confuses their language so that they cannot understand one another and scatters them over the face of all the earth. They stop building the city, and it is called Babel, because there the Lord confused the language.
The rest of the chapter follows the genealogy of Shem, from Arpachshad, born two years after the flood, to Terah, who at seventy begets Abram, Nahor and Haran. Haran, father of Lot, dies in Ur of the Chaldeans before his father. Abram marries Sarai, who is barren, and Nahor marries Milcah. Terah takes Abram, his grandson Lot and Sarai, leaves Ur for Canaan but stops in Haran, where he dies at 205 years old.