From what I have read about Norse mythology, Ragnarok as many people believe it to be, is not the end of the world. I make this point because people have been on a craze about the end of the world, and they rant about how every society predicted it, including the norse.

Ragnarok is predicted to be the destruction of most of the Norse Vanir including Odin. It was was said that two giants would fight one of fire the other of ice and the giant of fire would win the battle, the giant of fire would then go to Valhalla and attack and kill the Vanir. Though I have not read the Poetic Edda myself I would like to, and interpret this for myself.