This is the only historical description of the pre-Flood world. Important history to know,

The description of Cain's family line after he leaves the presence of the LORD (Genesis 4:16) and how Cain's family line is typified in the person of Lamech.
Also, God's common grace and glory through showing Himself in man's creativity.
Following that, the birth of Seth and a godly line through whom all people on earth today are descended and the Messiah would come (Luke 3:38).