Genesis 11:10 says, These are the generations of Shem: Shem was an hundred years old, and begat Arphaxad two years after the flood:  The rest of the chapter simply gives a more detailed genealogy of Shem.  Verse eleven states, And Shem lived after he begat Arphaxad five hundred years, and begat sons and daughters.  Verse twelve says, And Arphaxad lived five and thirty years, and begat Salah:   Verse thirteen adds, And Arphaxad lived after he begat Salah four hundred and three years, and begat sons and daughters. Verse fourteen says, And Salah lived thirty years, and begat Eber: Verse fifteen adds, And Salah lived after he begat Eber four hundred and three years, and begat sons and daughters.  Verse sixteen says,  And Eber lived four and thirty years, and begat Peleg:  As stated earlier, Eber was the father of the Hebrews.  Verse seventeen adds, And Eber lived after he begat Peleg four hundred and thirty years, and begat sons and daughters.  Verse eighteen says, And Peleg lived thirty years, and begat Reu:  Verse nineteen adds, And Peleg lived after he begat Reu two hundred and nine years, and begat sons and daughters. Verse twenty says, And Reu lived two and thirty years, and begat Serug:  Verse twenty-one adds, And Reu lived after he begat Serug two hundred and seven years, and begat sons and daughters. We see that the length of life is decreasing.  Verse twenty-two says, And Serug lived thirty years, and begat Nahor:  Verse twenty-three adds, And Serug lived after he begat Nahor two hundred years, and begat sons and daughters.  Verse twenty-four states, And Nahor lived nine and twenty years, and begat Terah:  Verse twenty-five says, And Nahor lived after he begat Terah an hundred and nineteen years, and begat sons and daughters.  Verse twenty six adds, And Terah lived seventy years, and begat Abram, Nahor, and Haran.  We are now to Abram..  Verse twenty-seven adds, Now these are the generations of Terah: Terah begat Abram, Nahor, and Haran; and Haran begat Lot.  We also have the record of the birth of Lot, Abram's nephew.  Verse twenty-eight adds, And Haran died before his father Terah in the land of his nativity, in Ur of the Chaldees.  This is the first time that it is mentioned that a son died before his father, with the exception of Abel.  It may be to show why Lot was with Abram.  Verse twenty-nine states, 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.  Verse thirty declares, But Sarai was barren; she had no child.  Verse thirty-one adds, 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.  Terah took Abram, Sarai, and Lot and went to the land or Ur of the Chaldees.  Verse thirty-two concludes, And the days of Terah were two hundred and five years: and Terah died in Haran.  This bring us from the flood to Abram, or later Abraham, through the descendants of Shem.  We do not have the genealogy of Ham and Japheth, but they were also having generations of sons and daughters, so there were many more people in the world.