Millenarianism is a belief that something big and important is going to happen very soon. It usually involves an idea of a new start and a better world, with the current world ending and being replaced by the new one. Some religions have beliefs related to millenarianism; they may talk about a certain time when their god or spiritual leader will come and bring about a new and better world for everyone. Some people also have strong feelings about the future, believing that big changes are coming soon and will bring about a much better world.