Note the nature of the beliefs one must have about another to trust that other. In the encapsulated-interest account, one must know something about the incentives the other has to fulfill the trust (and something about their understanding of those interests, as well). Although valuations of various things are idiosyncratic, we are apt to be fairly adept at assessing someone's interests in many things; thus we might learn to assess trustworthiness that is grounded in the potential trusted's encapsulation of our interests. Trust that is grounded in moral commitments, norms, or bald commitments may be much less generalizable and therefore less easily assessed.

Russell Hardin, Trust and Trustworthiness, loc. 531