W.D. Ross
When multiple genuine moral obligations conflict, how do I know which one takes priority — and can any formula tell me?
W.D. Ross developed a pluralistic moral theory that recognizes multiple prima facie duties — obligations that hold unless overridden by stronger obligations in a particular situation. His duties include fidelity (keep promises), reparation (make amends), gratitude, justice, beneficence (do good), self-improvement, and non-maleficence (don't harm).
Ross rejected both Kant's rigid rule-following and utilitarianism's single-metric approach. He argued that morally mature people have an intuitive grasp of these duties and can weigh them against each other in context. No duty is absolute, and no formula tells you which duty wins — practical wisdom is required. This makes Ross's ethics both humble and realistic.
Ross is also notable for his foundational role in moral epistemology: he held that some moral truths are known directly, by intuition, in a way analogous to how we know basic truths in mathematics. This is not mere gut feeling — it is the result of sufficient moral experience and reflection. His defense of moral intuition as a source of genuine knowledge, rather than mere psychological noise, has had significant influence on contemporary moral philosophy.
Historical Context
Ross wrote as a direct interlocutor with G.E. Moore's moral philosophy and in reaction to both Kantian rigidity and utilitarian reduction. The early 20th century saw intense debate between intuitionists who believed moral truths were self-evident and naturalists who tried to reduce ethics to psychology or sociology. Ross developed his pluralistic account as a middle path: moral knowledge is real, but it is complex, contextual, and requires the exercise of judgment that no theory can replace.
Key Ideas
- Prima facie duties — multiple genuine obligations that can conflict
- No single duty is absolute; context determines which prevails
- Moral perception — the ability to see which duties are at stake
- Practical wisdom required to weigh competing obligations
- Seven categories of duty: fidelity, reparation, gratitude, justice, beneficence, self-improvement, non-maleficence
- Moral intuitions as a source of genuine knowledge, not mere feeling
Core Concepts
An obligation that holds in a situation and creates a genuine moral reason, but which can be overridden by a stronger obligation. 'Prima facie' means 'at first glance' — the duty is real, but it is not automatically decisive.
The duty that, all things considered, you are genuinely obligated to perform in a particular situation after weighing all the competing prima facie duties. Determining your actual duty requires judgment, not calculation.
The residue of obligation that remains even after you have done your actual duty. If you had to break a promise to prevent harm, you still owe the person you disappointed an explanation and perhaps reparation — the broken duty doesn't simply vanish.
The prima facie duty to keep promises and honor commitments. For Ross, this is one of the most important duties precisely because it is grounded in something we have actively created — a relationship of trust.
Key Texts
- The Right and the Good (1930)
- The Foundations of Ethics (1939)
Where This Shows Up in Frameworks
Why This Shows Up in Frameworks
When your framework weighs multiple moral considerations without a master formula, Ross is present. His approach legitimizes the practice of holding multiple obligations and using judgment to navigate between them — and it validates the experience of moral remainder, the sense that something real was lost even when you made the right call.