Making Assumptions About the Biblical Account

Bible Skeptics claim that Cain would have had to marry a sister since no other women were around. This is a classic demonstration of making assumptions about the biblical account that are incorrect both scientifically and biblically.

Even if Cain married a sister (which the Bible does not say), it would not be incest. The genome of humans at the early stage of human creation would have been perfect. Incest is when two people with DNA from the same imperfect parents produce a child. We all have mutations in our DNA from the thousands of generations of humans on Earth. Any brother having a child with his sister today would be dooming the child to genetic issues.

People making assumptions about the biblical account are only guessing and may contradict other biblical passages. How many children were born in the “Garden of Eden?” In Genesis 1:28, God told Adam and Eve, “Be fruitful, and multiply, and fill the Earth …” Some have suggested that this is the only command God ever gave that humans have completely obeyed. The point is that they either had children or they disobeyed God. The skeptic’s only alternative is to assume their time in the Garden was too short to bear children.

Genesis 4:16-17 says, “Cain went out from the presence of the Lord, and settled in the land of Nod, east of Eden.” The Bible does not say that Cain took his wife to Nod, so he must have married a woman living in Nod. This would be a distant relative from the population that left the Garden of Eden. Genesis 5 lists the genealogy from Adam to Noah, leaving out Cain’s descendants. Genesis 6:1-5 records the increase in human population using the word “Nephilim,” meaning fallen ones. It does not mean aliens or monsters, as some have suggested, but those who rejected God.

Making assumptions about the biblical account is dangerous because the Bible does not tell us many things about early humans. Neither does the geologic fossil record give us the details we want to know. But what is actually recorded in the Bible is not at odds with the geological evidence. As in all such questions, you can intelligently and reasonably believe both the scientific evidence and the biblical record. They are symbiotic.

— John N. Clayton © 2024