One question I’ve got on this, and this has been a real challenge for me, is whether evolution is reconcilable with the doctrine of original sin as I currently understand it.
First, most every reference made to the story of original sin seems to posit the historical accuracy of the Adam and Eve story in Genesis, despite many Catholics’ belief that the creation story is a non-literal account that doesn’t describe the physical “how and when” of the actual events. Secondly, as has been noted, there is genetic evidence that Adam and Eve may not have lived at the same time in history. The term, “most recent common ancestor” (MRCA) refers to the maternal
“Mitochondrial Eve” and paternal
“Y Chromosome Adam.” In other words, geneticists have calculated that the DNA in everyone on earth’s mitochondria (the energy-producing parts of our cells) come from one female who lived around 140,000 years ago somewhere in Kenya, Tanzania, or Ethiopia. All human males, traced by genetic analysis of the Y-chromosome, are descended from a single man that lived about 60,000 years ago. These two people didn’t live concurrently.
If that’s true, which it may not be given my limited exposure to the genetic literature (please let me know), it’s hard to reason how the Genesis account of “Adam’s fall” has been transmitted to his descendents via concupiscence or some other mechanism (incidentally, Eve sinned first).
Now, there IS some evidence from neuroscience that we instinctually don’t do the right thing all the time, that we have a predilection to sin (maybe inherited genetically?), but as I understand it, a “predilection” to sin isn’t the same as original sin. As I read it, I still rely on the grace of God to help me overcome my more base instincts (no matter how I got them), and to help in striving toward an upright life, but I still have a hard time intellectually reconciling the traditional view of original sin with genetic science.