"I describe a conception of law that takes it to be not a rival system of rules that might conflict with morality but as itself a branch of morality. It is necessary, to make that suggestion plausible, to emphasize what might be called procedural justice, the morality of fair governance as well as just outcome. It is also necessary to understand morality in general as having a tree structure: law is a branch of political morality, which is itself a branch of a more general personal morality, which is in turn a branch of a yet more general theory of what it is to live well".
DWORKIN, Ronald. Justice for Hedgehogs. Cambridge: Harvard University Press, 2011, p. 5.