 The new normative power views generally ground the power the same way other elements of Hohfeldian (1919) systems (e.g., rights and privileges) have been grounded, by appeal to our interests (see Feinberg 1970). Perhaps the paradigm of such a view is HLA Hart’s appeal in his seminal “Are There Any Natural Rights?” (Hart 1955), where he makes promissory obligations out to rest on “special rights” generated by the parties, in the interests of “freedom of choice”: