Genesis 4:17
17Cain knew his wife. She conceived, and gave birth to Enoch. He built a city, and named the city after the name of his son, Enoch.
Life continues for the marked man: a wife, a son, a city named Enoch. Culture rises even among those who have walked from the Lord’s presence.
Achievement is distinct from peace with God. Cities can be built in Nod. Grace still allows family and work; it does not baptize distance from the Lord as safety.
Providence preserves Cain’s household. A city appears early—human making under a curse, named for a son. Common life is not snuffed out.
God restrains chaos enough for civilization to start, even east of Eden. That is common grace, not proof that Cain’s way has become the way of life.