Take the story of Cain and Abel. Why were we given that story? Scientifically, you may have an explanation for it, but I'm not approaching it from the scientific point of view. I'm saying: Why do we need that? It's a sordid story, a depressing story, a dark story. Why should I believe that I'm a descendant of either Cain or Abel? Thank God there is a third son! [Genesis 4:25]