The Nature of Authority provides a comprehensive theory of the nature of authoritative guidance. It argues that the following claims exhaust the constitutive properties of authoritative tellings: authoritative tellings (1) tell subjects what to do; (2) give rise to reasons to comply; (3) are issued by personal beings and govern the behavior of personal beings; (4) are issued by rationally competent beings and govern the behavior of rationally competent beings; (5) are issued under a claim of right that counts as plausible in virtue of being grounded in a system to which subjects acquiesce as governing their behavior; (6) are issued by beings with the power to impose their will on subjects with respect to what they do; (7) create obligations to comply; and (8) are backed by a threat of detriment that is reasonably contrived to deter enough noncompliance to enable the system to minimally achieve its ends.