One way to resolve it, similar to what folks have said before:
All human societies share many traits (existence of language, music, humor, poetry, familial groupings, hierarchies, sexual jealousy, taboos against mother/son incest, humorous insults, history, etc.). One trait that is shared among all human societies is a sense that some actions are good, and other actions are bad. Moms having sex with sons, for example, equals bad. Sons bringing food to mom, for example, equals good. In other societies, son living with mom into adulthood equals bad (“he’s a little stay-at-home mooching loser!”) while in other societies, son living with mom into adulthood equals good (“He really takes care of his mother, doesn’t he?”)
But in all human societies, there is a acknowledgment of the difference between good and evil (though that specific knowledge varies). That suggests pretty strongly that such an acknowledgment is part of our makeup, that something in our core is capable of making such distinctions.
Religious folks might call this core our “soul”; scientific folks might call it our “genes.” While our soul comes from God, our genes come from evolution.
Adam and Eve, therefore, may be a metaphor for that point in the evolution of homo sapiens when our brains first developed the wiring necessary for distinguishing between good and evil. That wiring may also be responsible for subsystems like awareness of our own suffering, which explains why God cast us out of the Garden. And the knowledge of this difference contains within it the capability of committing evil: a creature without the wiring necessary to distinguish between ethical and unethical acts is incapable of committing an unethical act.
Our newfound capability, by this reasoning, can only be moderated by a moral code of compassion. That’s what Jesus brings to the scene.
Personally, I don’t find this a useful metaphor; I categorically reject the idea that it was originally intended to be a metaphor. However, I see no reason why, if it’s treated as metaphor, the underlying message of the Christian creation story (and redemption story) would contradict the facts of natural selection.
Daniel