An Enquiry Concerning the Principles of Morals by David Hume is a philosophical work that explores the nature of morality and its foundation. Hume argues that morality is derived from human sentiments rather than reason. He rejects the idea of a priori moral principles and suggests that our moral judgments are based on our emotions and experiences.

Hume emphasizes the role of sympathy and benevolence in moral decision-making. He contends that our moral judgments are influenced by our ability to empathize with others and our desire to promote human happiness. Hume also discusses the importance of virtue and vice, arguing that these concepts are rooted in our social and emotional nature.