A small group of citizens controlled things.
I think this is as close as I can get for an For the Greeks (or more particularly the Athenians) any system which excluded power from the whole citizen-body and was not a tyranny or monarchy was described as an oligarchy. Oligarchies were perhaps the most common form of city-state government and they often occurred when democracy went wrong. (Hope this helps!) =^-^=
It was controlled by a small group of citizens.
An oligarchy is a type of government in which all power is held by a small group of people. This was a common form of government in ancient Greece. Aristotle believed that oligarchies were a type of corrupt aristocracy, as the power was placed in the hands of those who did not deserve it. Aristocracy was different in the sense that it placed power on the hands on a small group of people who knew how to exercise it for the benefit of all.
The definition of Oligarchy is "a small group of people having control of a country, organization, or institution."
The Greek City-State of Sparta was a warrior society. Everyone was either respected to find and hunt for food or steal it, as they lived in a very mountainous isolated region- a big consequence of Greece's geography.
It was run by oligarchs. This meant that rich aristocrats ruled over them, and usually had laws in favor of the wealthy. That meant the rich got richer, and the poor lost their money, and got poorer. Perhaps this was the reason why there were so many hardships in Sparta, and this possibly led to its downfall.
Hopefully this helped!