The bottom line is IF God exists (Obviously meaning the Christian God for the argument's sake) we will then have Original Sin.
This is getting way off topic, and there are many Christians that would disagree with that position. There is nothing that I know of in the nature of GOD that suggests or necessitates Original Sin.
If you wish to explore that concept, perhaps starting a Proposed New Topic might be in order?
Aslan is not a Tame Lion