i believe the bible teaches original sin,in the sense of it being inherent in our nature

Perhaps it does, but it's a pretty abhorrent bit of teaching if so. I can't think of anything more innocent or pure in spirit than a new-born baby. I don't see how anyone can argue that sinfulness is inherent in that baby's nature. Setting aside the fact that I'm an atheist for a minute, I have to ask myself whether I could ever accept that teaching under any circumstances. It sounds like another method of capturing and controlling people to me. Tell them they are fatally flawed right from the outset, so much so that heaven is denied for all eternity, and that the only salvation is to join the Catholic club. Well, I suppose it's cheaper than enticing people with introductory free gifts.

I wonder where all those good people are who died before baptism was invented.