Anarchy.
Goverment Rule
When Caesar Augustus came into power the republican or democratic form of government became extinct. Although Augustus kept the appearance of a republic, he kept all the meaningful power for himself.
An oligarchy is a form of government in which an elite group controls the government.
A monarchy is a government in which the king has the power to rule the country.
The form of government the Romans had set up after they freed themselves from Estrucan rule was a Republic.
oligarchy
absolute monarchy > <
An oligarchy is a form of government in which few people hold power.
The Dutch government is a Democracy which is technically still under monarchical rule.
If you meant 'what form' - it's a democratic government.
absolute monarchy > <
Military Dictatorship