  Linked with these meta-ethical controversies is the dilemma of understanding the ethical life either as the “ancients” do, in terms of virtues and vices of character, or as the “moderns” do, primarily in terms of principles of duty or natural law. While even so law-oriented a thinker as Hobbes has a good deal to say about virtue, the ethical writers of the seventeenth and eighteenth centuries predominantly favor a rule- or law-governed understanding of morals, giving priority to laws of nature or principles of duty. The chief exception here is the moral sense school, which advocates an analysis of the moral life more like that of the Greek and Hellenistic thinkers, in terms of settled traits of character — although they too find a place for principles in their ethics. Hume explicitly favors an ethic of character along “ancient” lines. Yet he insists on a role for rules of duty within the domain of what he calls the artificial virtues.