Nomad, if your intuition tells you we're not born sinners, then you are right, and go with that. That's the deception of the Bible, and a third of the world has fallen for it.
God did not create a perfect world that man messed up. He created a primordial soup that needed to be tamed. Some might view this as some sort of sick form of self-entertainment, but it really sprang out of loneliness. There is no "sin" in feeling lonely, but if you're "God", in order to "create" something or someone that you can interact with, and when I say "interact" I mean sharing love unconditionally, then you can't just snap your fingers and produce an "equal". You have to actually break a part of yourself off, and throw it out there to "learn" how to be like you, through trial and error. That part of God that he split off from himself would be US.
I think this guy explains it pretty well....
http://www.crawford2000.co.uk/wilcock-spiritual-evolution-god-future-change-cos.htm