Are Adam and Eve real historical figures that lived 6000 years ago, or are they metaphorical representations? It is an interesting question and Alister McGrath recently chimed in on this issue.
There are those who would say that Adam and Eve designate specific historical figures. That makes some sense, acknowledges McGrath, but it makes even more sense to say that Adam and Eve are stereotypical figures—represent human potential as created by God but also with the capacity to go wrong.
McGrath would like to toss out for consideration the idea that the story of Adam and Eve is the story of all of us—people with both the greatest intentions and the greatest of gifting—but still with the ability to fail. The Adam and Eve story tells us that this is not accidental—this is what it means to be human.
The real question is: is there anything to be done about this human quandary? In the book of Romans, Paul writes that Christ is the second Adam, who offers a second chance for humanity. This is our story, we have gone wrong but there is something to be done about it. And that something is the transformation that is brought about by the life, death, and resurrection of Jesus Christ.
Also see NT Wright discussing the very same topic – here. Very much well worth the listen and consideration.