What would have happened to the Christianity if it had not been adopted as state religion at the time. Hard to imagine that it would be have been anything more than a small sect? Btw the bible already had adopted and contained all sorts of stories borrowed from paganism.
One of the greatest tragedies known to the Christian faith was Constantine who called himself the 13th apostle who then murdered his family an married the pagan religion to the Christian faith that became the Catholic Church....
