Hereditary monarchy

A hereditary monarchy is a form of government and succession of power in which the throne passes from one member of a ruling family to another member of the same family. A series of rulers from the same family would constitute a dynasty. It is historically the most common type of monarchy and remains the dominant form in extant monarchies.

In most extant hereditary monarchies, the typical order of succession uses some form of primogeniture, but there exist other methods such as seniority and tanistry (in which an heir-apparent is nominated from among qualified candidates). Research shows that hereditary regimes, in particular primogeniture, are more stable than forms of authoritarian rule with alternative succession arrangements.

Succession

Theoretically, when the monarch of a hereditary monarchy dies or abdicates, the crown typically passes to the next generation of the family. If no qualified child exists, the crown may pass to a brother, sister, nephew, niece, cousin, or other relative, in accordance with a predefined order of succession, often enshrined in legislation. Such a process establishes who will be the next monarch beforehand and avoids disputes among members of the royal family. Usurpers may resort to inventing semi-mythical genealogies to bolster their respectability.

Historically, there have been differences in systems of succession, mainly revolving around the question of whether succession is limited to males or whether females are also eligible (historically, the crown often devolved on the eldest surviving female child, as the ability to lead an army in battle was a requisite of kingship).