'Original Sin' is a term invented by Christianity to define our foundational status before 'God' and accentuate our incapacity for self-redemption.
The concept of 'Original Sin' is an accurate summary of the Genesis account.
I would state it is something like this:
Genesis 3:1-20 was created to articulate our seperation from the Divine Mind resulting in the polarization of our thoughts and actions into 'good and evil'. As long as we think of things as 'good and evil' we can never experience the true virtue of justice which stands in the presence of 'God' and this is why God says to Adam in Gen 3:9 "Where are you".
Because Adam seperated himself from God by polarizing his thoughts (tree of Good and Evil), God cannot no longer 'find him' in his own presence and has to call for him. This is were 'The Christ" principle enters into play as a 'redeemer and mediator' between God and Man, drawing people to God.
This is 'The Logos' of Heraclitus, Platonism and Christianity.
Early Christians used their Platonic interpretation of the Old Testament (amongst other things) to create The Christ Myth.
Also, take great notice of the role of the woman in all of this and compare it to ancient near east and greek tradition.
Do you see how the woman works in cooperation with the serpent independant of the man's knowledge?
The woman here is not the deceiver, but is the MEDIATOR of deception ....akin to early greek and babylonian mythology.