If evolution is true, what about Romans 5? Isn't death the consequence of sin? How could there be death before Adam?
In my opinion, this is the most legitimate question that can be asked of Christians who believe that science has irrefutably proven evolution.
But it is easily answered.
Pretty simply, I don't believe Romans is ever talking about physical death. In fact, with even a little research in the New Testament, it's hard to believe anyone thinks Romans 5 is talking about physical death.
The verse that is usually at question is Romans 5:12, which reads:
Of course, we see from Ephesians 2, that we're already dead in our trespasses and sins. It is not physical death that passed upon us all, but spiritual death.
The same is true in Genesis.
Long before I was ever involved in an evolution-creation debate, I had heard preachers—preachers who would be anti-evolution because of Genesis one—point out that God said that if Adam ate from the tree, then he would die "in the day" that he ate of it (Genesis 2:17). This was an issue because Adam lived 930 years after he ate from the Tree of the Knowledge of Good and Evil!
Some of those preachers explained that Adam began to physically die on the day he ate of the fruit, but most teach that he died spiritually on the day he ate of the fruit.
Combined with Romans 5 and Ephesians 2, I think it's inarguable that the consequence of sin is spiritual death, not physical death.
I do believe that there was a time, after God had created Homo sapiens through evolution, that he found an initial couple or an initial group and "breathed into their nostrils the breath of life" (Genesis 2:7). It was then that they became living souls.
Science actually provides an interesting piece evidence for such an occurrence.
One day I was browsing a bookstore, and I randomly picked up a book on evolution. It was purely a science book, nothing religious or Christian about it. I flipped it open to a random page, and the first sentence I read said, "About 35,000 years ago, there was a sudden and unexplainable leap in the creativity of man."
I now know that the date generally given for this "sudden and unexplainable leap" is 40,000 years ago, but either way, science acknowledges it. In a BBC video defending evolution against creationism, a scientist held two skulls in his hands. He explained that one was 60,000 years old and the other 40,000 years old, but although there were no physical differences between the two, there was nonetheless a massive difference in the way they lived and related with other humans.
So, in a sense, it appears, for those of us who believe science, but are Christians and Bible believers, that there was an Adam, but Romans 5 and Genesis teach that it is spiritual death that is the consequence of sin, not physical death.