Regarding original sin and the virgin birth, I thinks science again speaks to this.
The
Genographic Project is a project to trace the ancestry of humans across the globe. All human males share the same Y chromosome which traces back to a single male 60,000 years ago (which is different than everyone sharing the same common female ancestor more than twice that long ago).
Which doesn't really fit with the doctrine of original sin.
I'd be curious to see how some Christians resolve this; I know there's plenty of Christians who accept evolution (for example), and those that don't subscribe to a literal virgin birth, is the doctrine of original sin also in that same group, something that made sense at the time but now not really relevant today (other than to say that all humans are flawed and wrestle with what's right sometimes)?
Coming from a literal bible background it's hard for me to understand sometimes how one can view large chunks of the Christian story as myth but still have a Christianity at all.