Footnotes

1. 6:1–4 These enigmatic verses are a transition between the expansion of the human race illustrated in the genealogy of chap. 5 and the flood depicted in chaps. 6–9. The text, apparently alluding to an old legend, shares a common ancient view that the heavenly world was populated by a multitude of beings, some of whom were wicked and rebellious. It is incorporated here, not only in order to account for the prehistoric giants, whom the Israelites called the Nephilim, but also to introduce the story of the flood with a moral orientation—the constantly increasing wickedness of humanity. This increasing wickedness leads God to reduce the human life span imposed on the first couple. As the ages in the preceding genealogy show, life spans had been exceptionally long in the early period, but God further reduces them to something near the ordinary life span.
2. 6:2 The sons of God: other heavenly beings. See note on 1:26.
3. 6:4 As well as later: the belief was common that human beings of gigantic stature once lived on earth. In some cultures, such heroes could make positive contributions, but the Bible generally regards them in a negative light (cf. Nm 13:33; Ez 32:27). The point here is that even these heroes, filled with vitality from their semi-divine origin, come under God’s decree in v. 3.
4. 6:5–8:22 The story of the great flood is commonly regarded as a composite narrative based on separate sources woven together. To the Yahwist source, with some later editorial additions, are usually assigned 6:5–8; 7:1–5, 7–10, 12, 16b, 17b, 22–23; 8:2b–3a, 6–12, 13b, 20–22. The other sections are usually attributed to the Priestly writer. There are differences between the two sources: the Priestly source has two pairs of every animal, whereas the Yahwist source has seven pairs of clean animals and two pairs of unclean; the floodwater in the Priestly source is the waters under and over the earth that burst forth, whereas in the Yahwist source the floodwater is the rain lasting forty days and nights. In spite of many obvious discrepancies in these two sources, one should read the story as a coherent narrative. The biblical story ultimately draws upon an ancient Mesopotamian tradition of a great flood, preserved in the Sumerian flood story, the eleventh tablet of the Gilgamesh Epic, and (embedded in a longer creation story) the Atrahasis Epic.