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Google wrote:mon·arch
ˈmänərk,ˈmänˌärk/Submit
noun
1.
a sovereign head of state, especially a king, queen, or emperor.
Google wrote:king
kiNG/Submit
noun
1.
the male ruler of an independent state, especially one who inherits the position by right of birth.
And "Queen" is just the female variant of a king. By this definition, I will conclude that any legitimate monarchy where the Crown has actual power is inherently authoritarian. Right of Birth is an authoritarian justification for rule.