The US has been described as an oligarchy because economic elites and organized groups that represent special interests have substantial independent impacts on the US government policy.
With more than one ruler the empire would be better suited to protect itself from threats from barbarians and persia
Monarchy, political system based upon the undivided sovereignty or rule of a single person. The term applies to states in which supreme authority is vested in the monarch, an individual ruler who functions as the head of state and who achieves his or her position through heredity.
Explanation:
The Supreme Court limits the Congress power by evaluating the laws made by Congress since no laws can be valuable without being evaluated by the Supreme Court.
