 Of course, one might define “self-interested” in a broad way to include anything that motivates the agent. Typically, however, the analyst assumes that the agent’s preferences are narrowly self-interested; she cares only about her own economic advantage or her own health and safety. The assumption of narrowly self-interested preferences is very restrictive. An agent with narrowly self-interested preferences seems to be incapable of following a rule or having anything other than a prudential reason for action. The assumption of narrow self-interest thus seems to limit the conception of the normativity of law to a bare sanction theory of duty. We discuss this issue in section 4 below.