Ethics is the philosophical study of moral phenomena. Also called moral philosophy, it investigates normative questions about what people ought to do or which behavior is morally right. Its main branches include normative ethics, applied ethics, and metaethics.
Value theory is the systematic study of values. Also called axiology, it examines the nature, sources, and types of values. As a branch of philosophy, it has interdisciplinary applications in fields such as economics, sociology, anthropology, and psychology.
Rationality is the quality of being guided by or based on reason. In this regard, a person acts rationally if they have a good reason for what they do, or a belief is rational if it is based on strong evidence. This quality can apply to an ability, as in a rational animal, to a psychological process, like reasoning, to mental states, such as beliefs and intentions, or to persons who possess these other forms of rationality. A thing that lacks rationality is either arational, if it is outside the domain of rational evaluation, or irrational, if it belongs to this domain but does not fulfill its standards.
Christine Marion Korsgaard, is an American philosopher who is the Arthur Kingsley Porter Professor of Philosophy Emerita at Harvard University. Her main scholarly interests are in moral philosophy and its history; the relation of issues in moral philosophy to issues in metaphysics, the philosophy of mind, and the theory of personal identity; the theory of personal relationships; and in normativity in general.
Ruth Barcan Marcus was an American academic philosopher and logician best known for her work in modal and philosophical logic. She developed the first formal systems of quantified modal logic and in so doing introduced the schema or principle known as the Barcan formula. Marcus, who originally published as Ruth C. Barcan, was, as Don Garrett notes "one of the twentieth century's most important and influential philosopher-logicians". Timothy Williamson, in a 2008 celebration of Marcus' long career, states that many of her "main ideas are not just original, and clever, and beautiful, and fascinating, and influential, and way ahead of their time, but actually – I believe – true".
Alasdair Chalmers MacIntyre is a Scottish-American philosopher who has contributed to moral and political philosophy as well as history of philosophy and theology. MacIntyre's After Virtue (1981) is one of the most important works of Anglophone moral and political philosophy in the 20th century. He is senior research fellow at the Centre for Contemporary Aristotelian Studies in Ethics and Politics (CASEP) at London Metropolitan University, emeritus Professor of Philosophy at the University of Notre Dame, and permanent senior distinguished research fellow at the Notre Dame Center for Ethics and Culture. During his lengthy academic career, he also taught at Brandeis University, Duke University, Vanderbilt University, and Boston University.
Philippa Ruth Foot was an English philosopher and one of the founders of contemporary virtue ethics. Her work was inspired by Aristotelian ethics. Along with Judith Jarvis Thomson, she is credited with inventing the trolley problem. She was elected a member of the American Philosophical Society. She was a granddaughter of the U.S. President Grover Cleveland.
In ethics, value pluralism is the idea that there are several values which may be equally correct and fundamental, and yet in conflict with each other. In addition, value-pluralism postulates that in many cases, such incompatible values may be incommensurable, in the sense that there is no objective ordering of them in terms of importance. Value pluralism is opposed to value monism, which states that all other forms of value can be commensured with or reduced to a single form.
John Mitchell Finnis is an Australian legal philosopher and jurist specializing in jurisprudence and the philosophy of law. He is an original interpreter of Aristotle and Aquinas, and counts Germain Grisez as a major influence and collaborator. He has made contributions to epistemology, metaphysics, and moral philosophy.
Joseph Raz was an Israeli legal, moral and political philosopher. He was an advocate of legal positivism and is known for his conception of perfectionist liberalism. Raz spent most of his career as a professor of philosophy of law at Balliol College, Oxford, and was latterly a part-time professor of law at Columbia University Law School and a part-time professor at King's College London. He received the Tang Prize in Rule of Law in 2018.
Rational egoism is the principle that an action is rational if and only if it maximizes one's self-interest. As such, it is considered a normative form of egoism, though historically has been associated with both positive and normative forms. In its strong form, rational egoism holds that to not pursue one's own interest is unequivocally irrational. Its weaker form, however, holds that while it is rational to pursue self-interest, failing to pursue self-interest is not always irrational.
In ethics, two values are incommensurable when they do not share a common standard of measurement or cannot be compared to each other in a certain way.
Robert N. Audi is an American philosopher whose major work has focused on epistemology, ethics, rationality and the theory of action. He is O'Brien Professor of Philosophy at the University of Notre Dame, and previously held a chair in the business school there. His 2005 book, The Good in the Right, updates and strengthens Rossian intuitionism and develops the epistemology of ethics. He has also written important works of political philosophy, particularly on the relationship between church and state. He is a past president of the American Philosophical Association and the Society of Christian Philosophers.
In the most general terms, a reason is a consideration which justifies or explains an action, a belief, an attitude, or a fact.
Geoffrey Sayre-McCord is an American philosopher who works in moral theory, ethics, meta-ethics, the history of ethics and epistemology. He teaches at the University of North Carolina, Chapel Hill. He is also the director of the Philosophy, Politics and Economics Society.
Frances Myrna Kamm is an American philosopher specializing in normative and applied ethics. Kamm is currently the Henry Rutgers University Professor of Philosophy and Distinguished Professor of Philosophy at Rutgers University in New Brunswick, New Jersey. She is also the Littauer Professor of Philosophy and Public Policy Emerita at Harvard University's John F. Kennedy School of Government, as well as Professor Emerita in the Department of Philosophy at New York University.
R. Jay Wallace is Distinguished Professor of Philosophy and William and Trudy Ausfahl Chair at the University of California, Berkeley. His areas of specialization include moral philosophy and philosophy of action. He is most noted for his work on practical reason, moral psychology, and meta-ethics.
Philosophy is a systematic study of general and fundamental questions concerning topics like existence, reason, knowledge, value, mind, and language. It is a rational and critical inquiry that reflects on its own methods and assumptions.
Patricia Greenspan is a professor of philosophy at the University of Maryland, College Park. Greenspan works in analytic philosophy of action, and is known for work on rationality, morality, and emotion that helped to create a place for emotion in philosophy of action and ethics.
Humeanism refers to the philosophy of David Hume and to the tradition of thought inspired by him. Hume was an influential eighteenth century Scottish philosopher well known for his empirical approach, which he applied to various fields in philosophy. In the philosophy of science, he is notable for developing the regularity theory of causation, which in its strongest form states that causation is nothing but constant conjunction of certain types of events without any underlying forces responsible for this regularity of conjunction. This is closely connected to his metaphysical thesis that there are no necessary connections between distinct entities. The Humean theory of action defines actions as bodily behavior caused by mental states and processes without the need to refer to an agent responsible for this. The slogan of Hume's theory of practical reason is that "reason is...the slave of the passions". It restricts the sphere of practical reason to instrumental rationality concerning which means to employ to achieve a given end. But it denies reason a direct role regarding which ends to follow. Central to Hume's position in metaethics is the is-ought distinction. It states that is-statements, which concern facts about the natural world, do not imply ought-statements, which are moral or evaluative claims about what should be done or what has value. In philosophy of mind, Hume is well known for his development of the bundle theory of the self. It states that the self is to be understood as a bundle of mental states and not as a substance acting as the bearer of these states, as is the traditional conception. Many of these positions were initially motivated by Hume's empirical outlook. It emphasizes the need to ground one's theories in experience and faults opposing theories for failing to do so. But many philosophers within the Humean tradition have gone beyond these methodological restrictions and have drawn various metaphysical conclusions from Hume's ideas.
