Definition
Millenarianism is the belief that there will be a golden age of peace and prosperity on Earth, lasting for 1,000 years (a millennium), often associated with a dramatic transformation or the second coming of a religious figure. It is often tied to hopes for social justice and radical change. Think of it as a utopian vision linked to religious expectation. It can be an optimistic or apocalyptic belief. It's found in many religions and cultures, not just Christianity. It often springs up during times of social unrest.