Answer: Oligarchy.
The word oligarchy is a Greek word which means "few to rule" defines a situation when power or command of a government or an entity lies in the hands of a few privileged persons or individuals. This could be a religious group, military, nobility, political or even wealthy family ties who preserve command and power within themselves. In such cases power is maintained in the group and passed from one generation to the next or through the relationship established between themselves.
The Oligarchy power structure is considered tyrannical because it depends on the obedience or oppression of the ruled (majority/ larger group) to continue existing. They rely basically on the imposition of rules, decrees and the exploitation of basic human rights to maintain their vested interests.
Plutocracy is another term commonly used in modern times similar in meaning.
