Anarchy (noun)

1. The absence of any form of political authority or government.
2. A state of society characterized by the absence of any form of political authority or government.
3. A state of disorder due to the absence or non-recognition of authority or other controlling systems.

Origin:

From french anarchie, from greek anarkhia "lack of a leader", from an- "without" + arkhos "leader".

Examples:

1. The country had descended into anarchy after the government collapsed.
2. The city was plagued by anarchy, as different gangs fought for control.
3. The students were calling for anarchy in the classroom, demanding more freedom.
4. Anarchy is often seen as a precursor to revolution.
5. The society had to rebuild after years of anarchy.