How does rational-legal authority differ from authority based on inheritance?

In sociology, the distinction between rational-legal authority and authority based on inheritance—often categorized under traditional authority—lies in the source of legitimacy and the criteria for holding power.1

Rational-Legal Authority
As defined by Max Weber, rational-legal authority derives its legitimacy from a belief in the validity of legal statutes and functional competence. It is the hallmark of modern bureaucracy, where power is exercised through uniform rules, standard operating procedures, and clearly defined roles. In this system, obedience is owed to the office or the legal structure rather than to a specific individual, and positions are typically filled based on merit and professional qualifications.123

Authority Based on Inheritance
Authority based on inheritance is a form of traditional authority, which rests on long-standing conventions and the sanctity of established customs. Unlike rational-legal systems, where power is tied to a functional role, authority here is often tied to the person or their lineage. Positions of power, such as royal or noble titles, are passed down through hereditary succession, such as primogeniture, regardless of the individual's personal competence or professional training.14

While rational-legal systems prioritize predictability and impersonal procedures, hereditary systems prioritize continuity through bloodlines and historical tradition.124