7 Go to, let us go down, and there confound their language, that they may not understand one another's speech.
So here the people have united, and god realizes that a united cooperating people can accomplish anything, so he decides to curse them and confound their speech so they can't work together anymore.
Why is god against them uniting?
Why is he against them building a tall building?
Clearly modern buildings must be taller than anything they could have built, yet god hasn't stopped us.
8 So the LORD scattered them abroad from thence upon the face of all the earth: and they left off to build the city.
9 Therefore is the name of it called Babel; because the LORD did there confound the language of all the earth: and from thence did the LORD scatter them abroad upon the face of all the earth.
10 These are the generations of Shem: Shem was an hundred years old, and begat Arphaxad two years after the flood:
11 And Shem lived after he begat Arphaxad five hundred years, and begat sons and daughters.
12 And Arphaxad lived five and thirty years, and begat Salah:
13 And Arphaxad lived after he begat Salah four hundred and three years, and begat sons and daughters.
14 And Salah lived thirty years, and begat Eber:
15 And Salah lived after he begat Eber four hundred and three years, and begat sons and daughters.
16 And Eber lived four and thirty years, and begat Peleg:
17 And Eber lived after he begat Peleg four hundred and thirty years, and begat sons and daughters.
18 And Peleg lived thirty years, and begat Reu:
19 And Peleg lived after he begat Reu two hundred and nine years, and begat sons and daughters.
20 And Reu lived two and thirty years, and begat Serug:
21 And Reu lived after he begat Serug two hundred and seven years, and begat sons and daughters.
22 And Serug lived thirty years, and begat Nahor:
23 And Serug lived after he begat Nahor two hundred years, and begat sons and daughters.
24 And Nahor lived nine and twenty years, and begat Terah:
25 And Nahor lived after he begat Terah an hundred and nineteen years, and begat sons and daughters.
26 And Terah lived seventy years, and begat Abram, Nahor, and Haran.
27 Now these are the generations of Terah: Terah begat Abram, Nahor, and Haran; and Haran begat Lot.
28 And Haran died before his father Terah in the land of his nativity, in Ur of the Chaldees.
29 And Abram and Nahor took them wives: the name of Abram's wife was Sarai; and the name of Nahor's wife, Milcah, the daughter of Haran, the father of Milcah, and the father of Iscah.
30 But Sarai was barren; she had no child.
31 And Terah took Abram his son, and Lot the son of Haran his son's son, and Sarai his daughter in law, his son Abram's wife; and they went forth with them from Ur of the Chaldees, to go into the land of Canaan; and they came unto Haran, and dwelt there.
32 And the days of Terah were two hundred and five years: and Terah died in Haran.