A traditional task of epistemology is to establish and defend systematic standards that must be met in order for us to have knowledge or justified beliefs. A "naturalized epistemology" tries to arrive at such standards through an empirical investigation into how we interact with our fellows and the world around us, what we seek in these activities, and the particular ways in which we can and cannot succeed. This approach is a radical departure from tradition because its means of investigation is empirical. Nevertheless, since its inception three decades ago, this style of epistemology has become a powerful trend in contemporary theory of knowledge. This collection breaks new ground in extending the insights and methodology of naturalized epistemology to the subject of moral knowledge and moral theory. The essays are divided between two overarching themes. One is the so-called fact-value distinction. How can an empirical study of knowledge hope to address the normative questions about how we should reason about moral matters, how we should live morally? The other is the relation of practical moral know-how to moral discourse. Can the biological underpinning of morality explain most of its central features or is moral discourse essential to our understanding of the cognitive dimensions of moral experience?