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.
