I never fully understood why the Calamity happened in the first place and why Bahamut wanted to destroy/destroyed the world of Eorzea. Is there documentation in the Lore either in game or in books that can explain this to me. I know from a non Lore perspective its because the new development team wanted to make a fresh new start for everyone and distance themselves from 1.0. Was it really necessary however to have a complete destruction of the world, I am deeply saddened at times that I can no longer go back and play story lines in 1.0 to me this was a big tragedy in gaming history albeit perhaps an important one.