Moral sense theory (also known as sentimentalism) is a view in meta-ethics according to which morality is somehow grounded in moral sentiments or emotions. Some take it to be primarily a view about the nature of moral facts or moral beliefs (a primarily metaphysical view)---this form of the view more often goes by the name "sentimentalism".
Others take the view to be primarily about the nature of justifying moral beliefs (a primarily epistemological view)---this form of the view more often goes by the name "moral sense theory". However, some theorists take the view to be one which claims that both moral facts and how one comes to be justified in believing them are necessarily bound up with human emotions.
Popular historical advocates of some version of the moral sense theory or sentimentalism include the 3rd Earl of Shaftesbury (1671–1713), Francis Hutcheson (1694–1746), David Hume (1711–1776), and Adam Smith (1723–1790). Some contemporary advocates include Michael Slote, Justin D'Arms, Daniel Jacobson, Jesse Prinz, and perhaps John McDowell. Simon Blackburn and Allan Gibbard endorse a non-cognitivist form of sentimentalism.
Marc D. Hauser (born 25 October 1959) is an American evolutionary biologist and a researcher in primate behavior and animal cognition who taught in the Psychology Department at Harvard University. In August 2010, a committee of Harvard faculty found Hauser solely responsible for eight counts of unspecified scientific misconduct. On August 1, 2011 Hauser resigned his position at Harvard.
Hauser received a BS from Bucknell University and a PhD from UCLA. Hauser was a Harvard College Professor, and Professor in the Departments of Psychology, Organismic & Evolutionary Biology, and Biological Anthropology. He was the co-director of the Mind, Brain, and Behavior Program at Harvard, Director of the Cognitive Evolution Lab, and adjunct Professor in the Graduate School of Education and the Program in Neurosciences.
Hauser's research lies at the interface between evolutionary biology and cognitive neuroscience and was aimed at understanding the processes and consequences of cognitive evolution. Observations and experiments focused on nonhuman animals and humans of different ages and mental competence, incorporating methodological procedures and theoretical insights from ethology, infant cognitive development, evolutionary theory, cognitive neuroscience and neurobiology. Foci include: studies of language evolution, the nature of moral judgments, the development and evolution of mathematical representations, comparative studies of economic-like choice, the precursors to musical competence, and the nature of event perception. One of his research projects was the internet-based 'The Moral Sense Test' in which the participant is presented with a series of hypothetical moral dilemmas and is asked to offer a judgment regarding each one.