List of monarchies
There are and have been throughout recorded history a great many monarchies in the world. Tribal kingship and Chiefdoms have been the most widespread form of social organisation from the Neolithic, and the predominance of monarchies has declined only with the rise of Republicanism in the modern era. A monarchical form of government can be combined with many different kinds of political and economic systems, from absolute monarchy to constitutional monarchy and from a market economy to a planned economy. Some examples for certain forms of monarchy are: "Extant monarchies are listed in bold type." Enlightenment and  later. Constitutional monarchies. A constitutional monarchy is a form of monarchical government established under a constitutional system which acknowledges an elected or hereditary monarch as head of state. Unitary constitutional monarchies. Unitary constitutional monarchies are unitary states which are governed constitutionally as one single unit, with a single constitutionally created legislature. Federal constitutional monarchies. Federal constitutional monarchies are federal states in which a number of federated entities are unified under a federal government and a single monarch, who acts as ceremonial head of state. Absolute monarchies. An absolute monarchy is a monarchical form of government where the ruler has the  power to rule his or her land or country and its citizens freely, with no laws or legally-organized direct opposition in force. Unitary absolute monarchies. Unitary absolute monarchies are unitary states which are governed as one single unit by a single hereditary or elected leader. Some had or have a single legislature, which may or may not be constitutionally created. Subnational monarchies. A subnational monarchy is a territory governed by a hereditary leader, but which is subordinate to a higher national government, either monarchical or republican in form. Shared monarchies. A monarch may reign over multiple kingdoms, dominions or  realms in various forms of political, dynastic, personal union or association.