Board Thread:Lore Discussion/@comment-9062114-20150428153757/@comment-26357188-20150815102111

But yes, I realize now that the Dragonfires are the things being used to prevent the Daedra from invading, and the towers are what essentially hold Mundus together. That was an error on my part.

I don't know why I didn't realize that before after reading about the Thalmor's true intentions.