The Sources of Authoritative Exclusion

It is often held that authoritative directives are intended to serve as exclusionary reasons, meaning that their intended force is that those who are subject to them should not act on or be motivated by some of their other reasons for action. I argue that the exclusion found in two common domains (practical rationality and non-instrumental moral duties) differs too much in character from authoritative exclusion to plausibly serve as its single source. I argue that a better account of authoritative exclusion can be constructed by combining those two sources, providing support for what I describe as a moralized version of Joseph Raz’s normal justification thesis, which understands obedience to authority as a requirement of instrumental morality rather than instrumental rationality.