Is that the right question? Methodologically speaking, I wonder if we're imposing a question on the text and forcing it to answer instead of allowing the text to raising it's own questions. We do need to ask the question in our own historical contingent context, but the question needs to be controlled by the nature of the text itself. I don't know what the solution is, but I'm on a "proper methodology" kick, that's why I'm asking. :)
I have yet to see someone who comes from the point of view that Adam and Eve are not historical try to explain the genealogies in the Bible. My question for those people still remains. At what point does the Bible become historical? And, why at that point? If Adam and Eve were in fact not historical, for me, the theological implication is huge. I wouldn’t trust the Bible to tell me the truth. In fact, I would probably start looking for some sort of religion or answer for why things are the way they are that does not base itself off of an allegorical story, but bases itself off of true history.