I'm not trying to troll. I'm asking a question looking for answers. I asked it here because there is obviously more people here. It's in the wrong section on purpose.
This is not a religious topic my good man. People knew the Earth was a sphere long before any religious group did and some of them were executed for it.
It's a pretty significant one. I'm not sure how "great" it is - but it led to the idea that one could travel toward the West in order to reach the East, and because of *that* the Americas were discovered.