You've mentioned in the past that Eastern Christianity and some forms of Western Christianity (namely, Mormonism) reject original sin. That's one of those technically-true-but-misleading statements.
All forms of Christianity accept what non-theologians are usually talking about when they say "original sin": that humans are all mortal and sinful due to Adam's sin. What they reject is the specific Augustinian articulation of original sin (that fallen humans can do nothing but sin without grace, that all humans are personally guilty of Adam's sin, and that said guilt is sexually transmitted), which I suspect only traditional Western theologians, Calvinists and some particularly sex-hating Catholics believe today.
See, I think it's the other way around. I think originally you were right, the rejection was specifically the Augustinian articulation. But the Catholic Church, as far as I can tell, hasn't articulated the doctrine that way (particularly the transmission via sex) in ages. If that's the case, Eastern Orthodox Christians (among others) should say "We're so glad that the Church has rejected the dumb parts of the doctrine and now we're in agreement with them."
But they don't. The continue to say they reject original sin, which to me suggests the rejection is less about the Augustinian articulation and more about marking themselves as different from mainstream Western Christian thought.
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