The old Norse people believed there was a fine balance between chaos and harmony, and that sometimes chaos had to erupt in order to bring about change and reclaim a new harmony. In such chaotic times, the “Jotne” (the giants) and the gods would fight, some gods would expire, but new heroes would arise, and those heroes would bring about the new harmony. The ultimate chaos was called “Ragnarok”. This was the time when the snake that kept the world in place would die, and all borders would fall.
I think we all go through such battles in our lives, be it an interior battle within ourselves, where chaos threatens to bring down our old beliefs and habits, or an exterior battle; chaos and unrest in the world, when humanity itself is plunged into chaos, and have to find new ways of life to cope with the disrupting changes, and to eventually restore harmony again.