Now, if the book of Genesis is an allegory, then sin is an allegory, the Fall is an allegory and the need for a Savior is an allegory - but if we are all descendants of an allegory, where does that leave us? It destroys the foundation of all Christian doctrine-it destroys the foundation of the gospel.
Whatever doesn't really happen is dreamed at night. It happens to one if it doesn't happen to another, tomorrow if not today, or a century hence if not next year.