Elective monarchy

An elective monarchy is a monarchy ruled by an elected monarch, in contrast to a hereditary monarchy in which the office is automatically passed down as a family inheritance. The manner of election, the nature of candidate qualifications, and the electors vary from case to case. Historically it is not uncommon for elective monarchies to transform into hereditary ones over time, or for hereditary ones to acquire at least occasional elective aspects.
==Evolution==
Many, if not most, kingdoms were officially elective historically, though the candidates were typically only from the family of the deceased monarch. Eventually, however, most elected monarchies introduced hereditary succession, guaranteeing that the title and office stayed within the royal family and specifying, more or less precisely, the order of succession.
Today, almost all monarchies are hereditary monarchies in which the monarchs come from one royal family with the office of sovereign being passed from one family member to another upon the death or abdication of the incumbent.
==Election==
In a hereditary monarchy, election may occasionally be used to fill a vacant throne. For example, the royal family may become extinct; depending on how precisely the succession to the throne is defined in law, several candidates with equally, or almost equally, strong claims could emerge, with an election being held to choose from among them. This differs from a formally elective monarchy in that it is an extraordinary measure, and with the new monarch the succession again becomes hereditary.
Alternatively, the monarch may be deposed, as in a revolution. While sometimes a monarch may be forced to abdicate in favour of his or her heir, on other occasions the royal family as a whole has been rejected, the throne going to an elected candidate.