What is the Conflict in Ragnarok?

Light vs. Dark. Good vs. Evil. This is the ultimate conflict leading to Ragnarok. In all of history the roots of good and evil have been what has driven man and god alike to act as they do, and Ragnarok is ultimately the conclusion to this epic struggle for dominance. Between my Aesir and the demonic Jotunn, the world will come to a conclusion, whether or good or evil, I am uncertain for now.