Introduction: In Search of Ethics Expertise -- A Guided Historical Tour -- Socrates and Moral Expertise -- Aristotle’s Moral Expert: The phronimos -- Hume on True and False Philosophy -- Moral Expertise: A Millian Perspective -- The Ineffable and the Incalculable: G.E. Moore on Ethical Expertise -- Pragmatism and Ethical Expertise -- Contemporary Perspectives -- Expert Moral Choice in Medicine: A Study of Uncertainty and Locality -- Societal Consensus and the Problem of Consent: Refocusing the Problem of Ethics Expertise in Liberal Democracies -- Ethical Expertise, Maternal Thinking, and the Work of Clinical Ethicists -- Contemporary Applications -- The Roles of Scientific and Normative Expertise in Public Policy Formation: The Anthrax Vaccine Case -- Philosophers Return to the Agora -- Ethical Expertise in the Clinical Setting -- Bioethical Expertise in Health Care Organizations -- The Expert Ethics Witness as Teacher.The complexity of the modern world has led to increasing professional specialization. Experts in a variety of fields, including ethics, offer advice and solutions. But where professional expertise often involves mastering certain facts, ethics expertise is distinct. It is not clear, for example, whether moral expertise consists of knowledge of right and wrong, the ability to articulate implications of moral premises, or the display of an outstanding character oneself. This volume examines philosophical conceptions of ethics expertise from both historical and contemporary perspectives, including applications of ethics expertise in such areas as bioethics consultation, expert witnessing and policy making. It will be of interest to scholars of moral philosophy as well as contemporary practitioners in many areas of bioethics.