An Enquiry Concerning the Principles of Morals

David Hume's An Enquiry Concerning the Principles of Morals is often called Hume's second Enquiry. His approach in the second Enquiry is largely an empirical one. Instead of beginning his moral inquiry with questions of how morality ought to operate, he purports to investigate primarily how we actually do make moral judgments. Of this work Hume said, "of all my writings, historical, philosophical, or literary, incomparably the best."