 Mill readily admits that no conduct is self-regarding in the sense that it affects only the agent themselves. “No person is an entirely isolated being” (Liberty, XVIII: 280). But it is only when an individual “violate[s] a distinct and assignable obligation to any other person or persons, the case is taken out of the self-regarding class” (Liberty, XVIII: 281). In the sense Mill intends, then, we harm an individual only when we violate an obligation to that individual. The damage done by the bad example set to others by a drunkard provides no legitimate reason for interference with his conduct; if his drunkenness causes him to violate the obligation to support his family, then that action constitutes a harm and is subject to interference.