This type of government is characterized by the rule of a small number of people. how the people are chosen varies from place to place: some have it based on family ties, while others use wealth or military position as a determining factor. in history many greek city-states, including sparta, used this form of governing.

Oligarchy--this form of government means "rule by a few" and is a government where only a few representatives runs the government. 

Oligarchies are found not only in politics but also in economic rule of businesses. A few people either chosen or elected to rule make the decisions for the whole government. It creates a small-scale checks and balance system but with just a few ruling, many voices are lost in this type of government.