Board Thread:Lore Discussion/@comment-15888551-20130823092654/@comment-10207438-20140209001158

well he was personally chosen by the chief god Akatosh, he is the a sort of incarnation of another god(the one who designed the entire realm of existance that everyone lives in) he became a god(then took the place of the god whom he was an incarnation of)

OH, and his blood keeps all powerful reality bending god-like beings from entering Mundus.

so yeah, he kind of was important to the survival of... well everything.