Q: Where did Adam and Eve’s sons get their wives? I’ve heard people talk about this for years, but I’ve never heard anyone give a clear answer. — E.M.
A: This is both a good and a poor question. It is a good one to ask Christians because they usually do not have a good answer. They might say that Cain and Abel’s wives were their own sisters and that incest had not yet been forbidden by the Christian god. However, this is a ridiculous attempt to impart realism to a fictional story.
For a rational person, it is a poorly framed question because Adam, Eve, Cain, and Abel are fictional characters. They never existed. We (homo sapiens) evolved over a long period of time from older Homo hominids. The evolutionary changes that occurred to produce homo sapiens from older Homo species (H. heidelbergensis, H. antecessor, etc.) happened very slowly and gradually over tens and hundreds of thousands of years. Males and females, of course, evolved along side each other, and so there was never any real situation where the “first humans” had problems finding mates.
Feel free to leave your answer to this question in the comments.