While the descendants of Cain resembled their father in his sinfulness and depravity, the descendants of Seth led a pious, well-regulated life, and the difference between the conduct of the two stocks was reflected in their habitations. The family of Seth was settled upon the mountains in the vicinity of Paradise, while the family of Cain resided in the field of Damascus, the spot whereon Abel was slain by Cain.
Unfortunately, at the time of Methuselah, following the death of Adam, the family of Seth became corrupted after the manner of the Cainites. The two strains united with each other to execute all kinds of iniquitous deeds. The result of the marriages between them were the Nephilim, whose sins brought the deluge upon the world. In their arrogance they claimed the same pedigree as the posterity of Seth, and they compared themselves with princes and men of noble descent.