If the first Adam does not need to be literal to be true, than neither does the last Adam.
1Cor. 15:45 And so it is written, The first man Adam became a living being. The last Adam became a life-giving spirit.
There are people that believe science falsifies all miracles and therefore interpret the entire Bible as allegorical truth. Bishop Spong and the Jesus Seminar are great examples. If we compromise on Genesis, we have no basis to criticize them. Why does Jesus have to be literal to be true, if Adam doesn't?
"My dad is a real-life Romeo" doesn't make Romeo a historical figure or my dad a mythical figure. Comparisons alone cannot be used to determine the historicity or mythicity of a figure.
And the issue of the relationship of the Resurrection to origins science has been addressed before:
http://www.christianforums.com/showpost.php?p=23643223&postcount=46
Many Christians hold the view that the Creation story was myth. I believe God created the earth in seven literal days, placed Adam and Eve in the garden where they sinned.
My question is for those who don't believe in a literal creation...Do you believe in the Adam and Eve story? Effectively, if Adam never existed, then there is no need for Christ. God never "made" man perfect and in His own image...we just evolved. To evolve, means to better yourselves in a way. We go from unintelligent apes to intelligent humans and we keep getting smarter and smarter until we eventually become perfect.
That's not what's happening. The bible states God created man in His perfect image, then through sin, man begins to go backwards. Though technology is improving, our morals and way of life is going backwards.
Simply speaking, if we're just evolving, we don't need Christ. If there was no Adam, sin never entered the world. What do you non-creationist believers say about this?
See what the Bible calls "perfection" isn't simply biological perfection. In the Bible God calls creation "very good". This shows that when creation was formed (whether 6,000 years ago, or 4.5 billion years ago) God was
pleased with it. God was pleased with every aspect of creation He had made.
Now, different TEs (theistic evolutionists) believe different things about Adam and Eve, but I believe that they were very real people who were given a very real choice to sin or to obey God, and who ended up choosing to sin. It may not have been something like plucking a fruit off a tree, but sin did have to
enter somewhere. God gave man the choice to believe or to reject Him, and man chose to reject Him.
Your question is, can evolution reverse this? It's a good question and it needs to be addressed. I would say that no, it cannot. The reason being that evolution is simply a theory of
biological change, not
spiritual change. Evolution cannot change our spirits, what makes us "human", any more than you can change the software in a computer by upgrading its processor and graphics cards.
Think of it this way. As Christians, we believe that all mankind has sinned and fallen short of the glory of God. Does that include
all mankind, even, say, geniuses? Yes, even geniuses have fallen short of the glory of God and sinned, no matter how smart they are. Well, let's say evolution proceeds and within four thousand years every human alive is as smart as Einstein. Nobody needs any more PDAs or calculators or computers because they can instantly run off differential equations in their heads and people teach calculus to 7-year-olds and all. They have become smart, sure. But remember what we said, that even if a human is a genius he or she is still a sinner until saved by the grace of God. Will that apply to them too? Yes. No matter how smart they are they will still need God. The same principle that applies today will apply then.
Evolution can only change our biology. It may make us (as a species) smarter or stupider, taller or shorter, faster or slower ... but it cannot change our relationship to God. Our relationship with God has nothing to do with genes, and only the blood of Christ can restore it. Rest assured that evolution is simply incapable of taking up that role.