 Loyalty is usually seen as a virtue, albeit a problematic one. It is constituted centrally by perseverance in an association to which a person has become intrinsically committed as a matter of his or her identity. Its paradigmatic expression is found in close friendship, to which loyalty is integral, but many other relationships and associations seek to encourage it as an aspect of affiliation or membership: families expect it, organizations often demand it, and countries do what they can to foster it. May one also have loyalty to principles or other abstractions? Derivatively, two key issues in the discussion of loyalty concern its status as a virtue and, if that status is granted, the limits to which loyalty ought to be subject.