God brings about the promised destruction of the earth by water.
The human race can be divided into two classes: the godly who listen to God and the ungodly who reject God.
This historical narrative provides the background to God’s decision to curse wicked mankind, the sons of God who rebelled, and the Nephilim with an earth-wide flood.
This genealogy helps us understand God’s plan for the world. The corruption of the human race threatens the godly line.
The abbreviated genealogy of Seth shows the godly direction that a descendant of Adam and Eve took in his submission to Jehovah.
"A genealogy shows the direction that the descendants of Cain took in their rejection of the revelation that God had given. The line of descent of Cain through Enoch culminated in Lamech. This man was a bigamist whose three sons were the founders of herding, music, and metallurgy. The fact that culture, including various arts and sciences, is recorded in the genealogy of the rebellious, ungodly line demonstrates that much of the image of God remained in these fallen creatures. These unbelievers still had the ability to discover and invent. Believers should not equate ungodliness with a lack of culture or intelligence."—Kenneth O. Gangel and Stephen J. Bramer,
Each descendant of Adam and Eve must choose whether he or she will listen to God or rebel against him.
Adam and Eve’s expulsion from the garden is for their own good. The fall of mankind into sin produces conditions of alienation from the Creator God, from fellow human beings, and from the created world.