if you think that Sparta is an oligarchy, you are wrong. Sparta is unable to have an oligarchy because they have two kings that have no power to the people. kind of like Great Britain. The only...
No, the US is a representative democracy. An oligarchy is where all the nation's power is in the hands of a group of small, usually self-appointed elite.
As an oligarchy is a ruling aristocracy or self-selecting elite, curiously, most modern 'communist' countries, such as China, Vietnam and Cuba, qualify. North Korea seems to have decided monarchy is...