Third, democratic regime is most prevalent kind of political system in the contemporary world. Under the democratic system, the political leadership is being changed by regular elections and subsequently, it is highly responsible to the people.
Last, monarchy is a from of government with monarch at the head. In this system, supreme authority and sovereignty is vested in a single hereditary figure, such as a King or Queen. However, monarch is somehow responsible to the people although it is not elected. Saudi Arabia is an absolute monarchy while, Thailand is a constitutional monarchy. The difference between two system is the existence of the Constitution.