Introduction to Ethics

Ethics is framed as a practical discipline aimed at answering how people ought to live and what actions they ought to take—questions that sit in the “normative” realm rather than the descriptive one. The lecture distinguishes ethics from fields like anthropology by emphasizing that moral philosophy doesn’t merely observe behavior; it evaluates it and prescribes conduct. Drawing on John Day’s definition, morality is presented as standards of right and wise action whose authority comes from reason rather than custom, making ethics centrally concerned with identifying good and bad ends to pursue and right and wrong conduct.

The lecture then maps the major questions moral philosophers have pursued. One core issue is what makes actions moral—what makes them good or bad, right or wrong—and another is why anyone should follow moral prescriptions at all. A further set of questions belongs to metaethics, especially whether moral judgments have objective truth values independent of personal attitudes. The discussion contrasts moral subjectivism, which treats moral claims as expressions of preference or opinion (and thus offers no rational way to settle conflicts), with moral realism or moral objectivism, which holds that moral judgments can be true or false based on objective features of the world.

That objectivity debate connects to “is–ought” reasoning, highlighted through David Hume’s famous challenge, often summarized as Hume’s Law. The lecture explains the problem as the difficulty of deriving normative conclusions (“what ought to be the case”) from purely descriptive premises (“what is the case”). Hume’s point is illustrated with wealth inequality: even if it is true that wealth is unevenly distributed, that fact alone does not logically yield the conclusion that people ought to equalize wealth through redistribution.

Next, the lecture turns to how actions are evaluated, contrasting theological and deontological ethical theories. Consequentialist (theological, in the lecture’s terminology) approaches judge morality by the consequences of an act—especially whether those outcomes tend to produce pleasure or pain, happiness, or general welfare. Deontological theories, by contrast, treat morality as grounded in authority independent of consequences; people must follow moral duties because they are duty-bound, not because of what will follow. The lecture notes that deontological accounts often appeal to God as the grounding authority, linking this to Jewish and Christian ideas of divine law, while also acknowledging that not every deontological view relies on a supernatural being.

Finally, the lecture raises a skeptical question: whether ethics can actually transform people into virtuous individuals. Emmanuel Kant is cited for warning about a gap between ethical theory and practical implementation—knowing what one should do isn’t the same as living it. Arthur Schopenhauer is even more pessimistic, arguing that virtue can’t be taught in the way genius can’t be manufactured, and that moral systems are unlikely to awaken the virtuous any more than aesthetics can reliably awaken poets or musicians. The lecture closes with Richard Taylor’s more optimistic emphasis on the urgency of the “good” question: each person has one life, and it can be wasted on worthless goals or shaped into a deliberate, thoughtful pursuit of what is genuinely worth striving for—because failure, once death arrives, is irrevocable.