Genesis 3-5

Something unique happened during the lifetime of Enosh son of Seth. The descendents of Adam were quickly perverted in their attitudes toward God.  Somehow the people of Seth began to distinguish themselves from other people. They honored the God of creation and call out his name. Maybe Adam had passed on the truth of God to his grandchildren. Maybe God revealed his name to Enosh. But two generations from the fall there was a flame of faith among some people that sought to restore fellowship between God and men. They did by conscience choice what the Law would later command; they served no other God but Yahweh.
Stuart