  A sophisticated variant of this view can be built around the notion of principled consistency (“integrity”) which, according to Dworkin’s later work, is a distinct political virtue that forms the foundation of law (Dworkin 1986). Taking principled consistency in the law as an interpretive target, the interpreter identifies a set of principles that together justify the given set of norms. The interpreter works therefore with two sets of norms, one composed of norms conveyed by institutions, the other composed of uncreated, genuine moral norms—general moral principles. He is to compare the two sets, and adjust the first in light of the second. He may then say that the law now includes both the original norms and the principles (or perhaps some further norms determined by the principles). Like its older, rules-and-principles cousin, the law is a hybrid, a creature of the two separate sets of standards, one grounded in social facts, the other in moral facts, that interpretation blends together (cf. Raz 1986). (A closely related variant says that the law is simply the set of principles that best justifies the institutionally given norms or, more loosely, the legal and political practices that generate them; Greenberg 2014). 