The chapter begins with the oldest line: Adam, Seth, Enosh and the rest down to Noah, who had three sons, Shem, Ham and Japheth. The author then follows the descendants of each, in the order of Japheth, Ham and Shem. Among the sons of Ham, Nimrod is remembered as the first mighty warrior on earth. In speaking of Eber, the text notes that in the days of his son Peleg the earth was divided among the peoples.
The author then returns to the line of Shem and follows it in a straight line, from Arpachshad to Terah and from Terah to Abram, who is Abraham. At this point the account stops widening the map of the nations and focuses on the family through which God would carry out his promise.
Next come the sons of Abraham: Isaac and Ishmael, with the twelve chiefs born from Ishmael, and the sons he had by Keturah. Isaac is identified as the son of the promise, and the sons of Isaac were Esau and Israel. The chapter closes with the descendants of Esau, the land of Edom, the kings who ruled there before Israel had a king, and the chiefs of Edom.