A state that can only be ruled by people of royal birth follows which theory of the orgin of state?

A state that can only be ruled by people of royal birth follows the "Divine Right Theory" of the origin of state. This theory posits that monarchs derive their authority directly from God, meaning that only those of royal lineage are deemed fit to rule. Consequently, the legitimacy of their power is seen as divinely sanctioned, reinforcing the idea that only individuals of royal birth can govern.