Cain's Wife

The objection is tidy. If Adam and Eve had two sons, and one killed the other, where did Cain's wife come from? The question treats Genesis 4 as if it were a census of the whole family. It is not.

Adam lives 930 years. The book says he fathered sons and daughters, not only the three who are named. Genesis 5:4 Named sons in this book are the ones the line needs. Unnamed children are still children. Cain's wife is one of them, or a niece in the next generation. The text does not satisfy our curiosity about her name. It does not leave her without a people to belong to.

A marriage of brother and sister is later forbidden. Leviticus 18:9 That law is given to Israel at Sinai, with a nation already in the world. It is not a law standing in Eden. The first generations have one family. If they are to fill the earth, they marry inside it. By the time Moses writes, the danger is the opposite: Israel dissolving into the nations around her. The laws match the moment they are given.

Some readers add a race of people already outside the garden, so Cain can marry a stranger and be afraid of strangers. The book does not say that. It says God made one man, and from him the nations come. Acts 17:26 Cain's fear, that whoever finds him will kill him, fits a growing family that already knows he killed Abel. It does not require a second creation.

Nod is not a country on a later map. The word is related to the word for wandering. He settles in the land of wandering, east of Eden. The city he builds is the first city in the story. It does not rescue him. His descendant Lamech is the one who turns murder into a song. Genesis 4:23