WHAT’S COVERED
In this lesson, you will explore the concept of prima facie duties and how they serve as an application of deontological ethics in real-world ethical decision-making. You will learn the origins and significance of these duties, how to apply them when facing moral dilemmas, and how to weigh conflicting responsibilities in practical situations. Specifically, this lesson will cover:
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Prima facie ethics is a branch of deontological moral theory developed by Scottish philosopher W.D. Ross in the early 20th century. Ross's theory aimed to correct what he saw as the rigidity of previous ethical systems, particularly Immanuel Kant's categorical imperative, which often offered no guidance when duties appeared to conflict.
Instead of proposing a single overarching moral rule, Ross introduced the concept of prima facie duties, or moral obligations that are binding unless they conflict with another, more important duty in a given situation. The Latin phrase prima facie means "at first glance," suggesting that these duties are self-evident and should be followed unless overridden.
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I suggest ‘prima facie duty’ or ‘conditional duty’ as a brief way of referring to the characteristic (quite distinct from that of being a duty proper) which an act has, in virtue of being of a certain kind (e.g. the keeping of a promise), of being an act which would be a duty proper if it were not at the same time of another kind which is morally significant.
| W.D. Ross
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If we consider the following situation, we can come to understand why prima facie duties can seem both workable and intuitively true. Anyone living in cities today can understand that there are complicated systems intended to ensure that everyone is safe.
EXAMPLE
We have established speed limits for how fast someone should drive on roads. These limits are intended to protect the safety of pedestrians, people in other vehicles, and ourselves when driving. Driving too fast opens many opportunities for injury or death. Thus, we seem to have (mostly) agreed that it is the responsibility of drivers to follow the posted speed limits. However, if we are rushing an injured person to the hospital, we might find that we need not pay attention to speed limits. One duty (to follow traffic laws) has given way to another duty (to assist those who are injured). The obligation to follow the law appeared to be in play, but it was only a duty “at first sight” -- or prima facie.
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Ross’s approach is appropriately considered deontological because it both rule based and finds that morality is tied in with duties to act. But as opposed to Kant’s deontology which does not allow for exceptions, Ross’s deontology accounts for our need to find which duties are more important than other duties. These prioritizations are not fixed, but depends upon the situations that one is in.
BIG IDEA Prima facie ethics teaches us that moral life involves balancing multiple duties, not following one rigid rule.
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Unlike consequentialist theories like utilitarianism that evaluate actions based on outcomes, prima facie ethics emphasizes moral intuition, context, and duty. It offers a middle path between absolute rules and purely outcome-driven decisions.
Ross argued that our common-sense moral experiences, such as feeling a duty to keep promises or make amends, are reliable indicators of ethical truths. These duties are not derived from a single principle but are recognized through reflection and practical reasoning.
TERM TO KNOW
Prima Facie Duty
A moral obligation that is binding unless overridden by a more important duty.
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People to know
W.D. Ross
Scottish philosopher (1877-1971) whose work in ethics was influential in the 20th century who is also well regarded as a translator of the works of Aristotle.
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As we saw above, Ross develops the idea that duties can give way to other duties. Instead of seeking out maxims of actions that can be applied universally (like actions conforming to the categorical imperative), Ross employs an understanding that we do have multiple overarching duties that give way to each other depending upon which is more important at the moment. These are his prima facie duties.
Shelly Kagan, however, prefers the term pro tanto obligations over Ross’s prima facie duties. Kagan argues that Ross’s terminology is misleading and invites confusion.
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It may be helpful to note explicitly that in distinguishing between pro tanto and prima facie reasons I depart from the unfortunate terminology proposed by Ross, which has invited confusion and misunderstanding. I take it that—despite his misleading label—it is actually pro tanto reasons that Ross has in mind in his discussion of what he calls prima facie duties.
| Shelly Kagan
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Core to Kagan’s terminology is clarifying that there is a difference in what the terms suggest.
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A pro tanto reason has genuine weight, but nonetheless may be outweighed by other considerations. Thus, calling a reason a pro tanto reason is to be distinguished from calling it a prima facie reason, which I take to involve an epistemological qualification: a prima facie reason appears to be a reason, but may actually not be a reason at all.
| Shelly Kagan
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Put more plainly, pro tanto expresses that the obligations are real but defeasible, while prima facie expresses that there is only the appearance of obligations. At some level this disagreement is one that might seem quite peculiar. No doubt Kagan and others are correct that the label pro tanto applies much better to the phenomenon that Ross is describing. But given the importance of Ross’s approach and his overall method, prima facie continues to be used when describing his work and his approach.
It is rather like how we continue to use the term ‘atom’ to describe a quite small object composed of a nucleus, electrons, and protons. The term ‘atom’ was originally used to refer to an object so small that it was unobservable and could not be divided into component parts. Then in 1897 British physicist discovered electrons, and we began to accept that the atom was not the smallest object after all. (In 1964 even the model of atoms composed of protons, electrons, and neutrons was made more complicated by the discovery of quarks – which make up protons and neutrons.) Just like we continue to use ‘atom’ today in a way that is not precisely correct anymore to its meaning, we continue to use ‘prima facie’ though the term is not precisely correct.
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Ross identified seven foundational duties, which he believed captured the most common moral obligations recognized across cultures. These are not ranked in a permanent hierarchy; rather, their importance varies depending on the context.
Fidelity: The duty to keep promises and be honest.
Reparation: The duty to make amends when one has wronged someone.
Gratitude: The duty to return kindness and show appreciation for benefits received.
Justice: The duty to distribute benefits and burdens fairly.
Beneficence: The duty to promote the well-being of others.
Self-Improvement: The duty to better oneself through learning and virtue.
Non-maleficence: The duty to avoid causing harm to others.
These duties form the ethical landscape that individuals must navigate. In real-life scenarios, more than one duty may apply, leading to conflicts that require moral judgment.
TRY IT Consider this scenario: You promised a friend you would meet them for lunch, but on your way, you see a stranger injured on the road. Which duty takes precedence: fidelity or beneficence?
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TERMS TO KNOW
Fidelity
The duty to be truthful and keep promises.
Reparation
The obligation to make amends for past wrongs.
Gratitude
The duty to acknowledge and repay kindness.
Justice
The moral requirement to act fairly.
Beneficence
The duty to help others and promote well-being.
Self-Improvement
The duty to develop one’s own character and intellect.
Non-Maleficence
The duty to avoid harming others.
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Applying prima facie ethics involves three key steps:
Identify the relevant duties: What obligations apply in this context?
Evaluate potential conflicts: Do any duties compete with each other?
Determine the actual duty: Based on the situation, which duty should guide your action?
Ross's framework assumes that moral agents must use judgment and reasoning to resolve dilemmas. For example, suppose a doctor has promised confidentiality to a patient (fidelity), but the patient reveals a plan to harm another person. The doctor must now weigh fidelity against non-maleficence and possibly beneficence.
THINK ABOUT IT Can you recall a time when you had two strong obligations that conflicted? How did you decide what to do?
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Let’s look at two example applications.
Case
Application
Medical Ethics
A physician learns that a patient with a communicable disease refuses to inform their recent contacts.
The physician must weigh their duty of fidelity (patient confidentiality) against non-maleficence and justice (preventing harm to others).
In this case, Ross's ethics may support breaching confidentiality for the greater duty of protecting public health.
Workplace Dilemma
An employee discovers that their company is illegally dumping toxic waste.
The employee feels a duty of loyalty to their employer (fidelity) but also a duty to prevent harm (non-maleficence) and justice (holding the company accountable).
Whistleblowing could be justified as the stronger duty.
These cases demonstrate how prima facie ethics can be practically applied, offering a flexible yet principled approach.
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TERM TO KNOW
Actual Duty
The duty that should be followed in a specific context after weighing competing obligations.
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While prima facie ethics has strengths in flexibility and realism, it faces several criticisms:
Lack of clear rules: Critics argue that Ross does not provide a concrete method to decide which duty takes precedence.
Relies on moral intuition: This can vary greatly between individuals and cultures.
No ranking system: In urgent situations, it may be difficult to make a quick, justified decision.
However, supporters argue that this lack of rigidity is a strength, allowing for context-sensitive decision-making that aligns more closely with lived human experience.
REFLECT Which of Ross’s duties do you find most important in your life? Has that duty ever conflicted with another, and how did you resolve it?
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SUMMARY
In this lesson, you learned that prima facie ethics, developed by W.D. Ross, introduces a practical and context-sensitive way to approach moral decision-making. Unlike theories that rely on a single principle or outcome, this view emphasizes multiple moral obligations that may conflict.
You explored the seven foundational duties Ross identified and saw how they can be applied in complex, real-world situations such as healthcare and the workplace. While not without criticism, prima facie ethics offers valuable tools for navigating ethical dilemmas where multiple responsibilities must be weighed.
By applying these duties thoughtfully and reflectively, you gain a deeper understanding of ethical reasoning in personal and professional contexts.
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REFERENCES
Kagan, S. (1989). The limits of morality. Clarendon Press.
Ross, W. D. (1988). The right and the good. Hackett Publishing Company. (Original work published 1930)
