I want to know the answer to the following question:
What was explained by the man  Giovanni Maria Mastai-Ferretti who later became leader of the Holy Roman Church ?
All the background I'm provided with is that "Since the Second Council of Orange against semi-pelagianism, the Catholic Church has taught that even had man never sinned in the Garden of Eden and was sinless, he would still require God's grace to remain sinless.". Is that enough to answer the question?