Thinking with Cases: An Introduction to Bioethics
How to read the case studies in this book
Starting in the Middle
It is the middle of the night, and a man is dying. He has end-stage cancer and a day or two left, and the pain has broken through the dose he is on. His doctor has left a standing order for morphine — not a single amount, but a range, to be given as the nurse judges the patient needs it. She can give a little or a lot. A larger dose would finally settle his pain. It might also slow his breathing enough to bring the end sooner, tonight instead of tomorrow.
His daughter is at the bedside, holding his hand, and she looks up at the nurse and says she cannot bear to watch him suffer anymore. The nurse draws morphine into the syringe and pauses, her thumb on the plunger. How much should she give?
No rule in the binder answers this. The order permits the whole range and leaves the choice to her. Her training tells her what each dose will do to his breathing; it does not tell her which one she ought to push. If her aim is to ease his pain and the shortened life is a side effect she foresees but does not intend, most ethicists — and most laws — say she has done nothing wrong. But she is the one holding the syringe, and the line between relieving death’s pain and hastening it runs straight through her hands.
What should she do?
Notice what the question is not. It is not a question about pharmacology — she knows exactly what each dose does. It is not a question about policy — the order and the law permit every choice in front of her. It is a question about what is right, and it cannot be answered by knowing more facts alone. Two nurses could agree on every detail of the man’s condition and still disagree about the syringe. That gap, between the medical facts and the right action, is where bioethics lives.
This book is a collection of such moments. Each chapter tells a true story in which thoughtful people, acting in good faith, reached the edge of what their training could settle and had to decide anyway. The stories are not here to be solved and filed away. They are here to be thought with. By the end of each one you should not have “the answer.” You should have a sharpened, more honest version of the question — and a clearer sense of what you yourself believe and why.
That is a strange promise for a book to make, so this opening chapter explains the tools. It introduces the core ideas of bioethics for a reader coming to the field fresh: what the discipline is, the four principles that organize most of its arguments, the ethical theories that sit behind those principles, and the basic skill of taking an argument apart to see how it works. It then explains how the cases in this book are built, and how they were written. None of this requires a background in medicine or philosophy. It requires only the willingness to sit with a hard question a little longer than feels comfortable.
What Bioethics Is
Bioethics is the study of the ethical questions raised by medicine, health care, and the life sciences. It asks what we owe one another when bodies, minds, and lives are at stake: when to treat and when to stop, who decides, what may be researched and on whom, how scarce help should be shared, and where the limits of medicine’s power should fall.
The field is young. It took its modern shape only in the second half of the twentieth century, when three forces collided. Medicine grew suddenly powerful — ventilators, dialysis, organ transplants, intensive care — and could now keep bodies alive in conditions no one had faced before. A series of research scandals came to light, in which doctors had treated patients as material rather than as people. And the old, unquestioned authority of the physician began to give way to a new insistence that patients have a say in what happens to them. Bioethics emerged to think clearly about problems that were genuinely new.
It helps, early on, to mark off what ethics is not, because three reflexes tend to short-circuit the conversation.
- Ethics is not the same as law. Laws can be unjust, and many things that are legal are still wrong (and a few illegal things may be right). “It’s allowed” and “it’s permitted here” do not answer the moral question; they change the subject.
- Ethics is not the same as religion. Religious traditions offer some of the deepest moral thinking we have, but a bioethical argument has to be one that people of different faiths, or none, can follow and weigh. The reasons have to be shareable.
- Ethics is not the same as personal preference. “I just feel it’s wrong” reports a fact about you, not a reason others can examine. Ethics deals in reasons that can be stated, challenged, and defended.
It also helps to know that ethical questions come in different kinds. Some are descriptive: what do people actually believe, and how do they in fact behave? Those are questions for psychology and sociology. Some are metaethical: what is goodness, and can moral claims even be true? Those are questions for philosophers. This book lives almost entirely in a third kind, normative ethics, which asks the practical question the nurse at the bedside is facing: what should be done here, and why?
The Four Principles
If bioethics has a common language, it is the language of four principles. In the 1970s the philosophers Tom Beauchamp and James Childress proposed that most moral disputes in medicine could be framed using four basic commitments that nearly everyone already shares, whatever their religion or politics (Beauchamp and Childress 2019). Their book made these four principles the working vocabulary of the field.
- Autonomy — respect for a person’s right to make decisions about their own life and body. This is the principle behind informed consent, and behind the patient’s right to say no.
- Beneficence — the duty to act for the good of others, to help, to promote well-being. It is the oldest impulse in medicine: do good.
- Non-maleficence — the duty to avoid causing harm. First, do no harm. It often pulls hardest exactly when beneficence is most tempting.
- Justice — the duty to treat people fairly and to share benefits and burdens equitably. It governs who gets the scarce organ, the ICU bed, the place in the trial.
Beauchamp and Childress argued that these four are part of what they called the common morality — the set of basic moral commitments shared across cultures and traditions. You do not have to be persuaded of a grand theory to accept them; you already live by them. Critics have sometimes called this “fourth-grade morality,” as if it were too simple to be serious. The reply is that the four principles are simple to state and very hard to apply — and that their simplicity is a strength, because it gives people who disagree about everything else a place to begin.
The principles do real work precisely because they conflict. The nurse with the syringe feels beneficence (the relief the morphine would bring) pulling against non-maleficence (the breathing it might suppress). A competent patient who refuses a life-saving transfusion sets autonomy against beneficence. A transplant committee feels one patient’s need against justice to all the others. In an easy case the principles agree, and there is no dilemma. In a hard case — the only kind worth a chapter — they point in different directions, and something has to give.
This is why bioethics is not a matter of memorizing rules. There is no fixed ranking that puts autonomy permanently above beneficence, or justice above both. The work is in the application: deciding what each principle demands in this particular situation (philosophers call this specification) and how much weight each should carry when they collide (balancing).
Consider a brief example. An elderly woman with early dementia still wants to live alone, though her doctors think she is no longer safe there. Autonomy says respect her wish; non-maleficence warns of the fall waiting to happen; beneficence wants her cared for. There is no formula that solves this. The careful move is to specify: how much capacity does she still have for this particular choice, and what is the real size of the risk? And then to balance: a small risk freely chosen may weigh less than the dignity of her own home, while a grave and certain danger may tip the other way. Two thoughtful people can run that process honestly and still land in different places. That disagreement is not a failure of the method. It is the honest shape of a hard problem.
Four Lenses for a Hard Case
Behind the four principles sit older and more ambitious ideas — the moral theories that have occupied philosophers for centuries. You do not need to master them to use this book. But it helps to know the main ones, because each works like a lens: a way of looking at a case that brings certain features into focus and pushes others to the edge. Faced with the same story, the lenses often ask different questions and sometimes reach different answers.
Consequentialism judges an action by its results. The most famous version, utilitarianism, says the right act is the one that produces the most good — the greatest well-being, the least suffering — counting everyone equally. Jeremy Bentham and John Stuart Mill gave the view its classic form: the question is not who you are or what rule you followed, but how much better or worse the world becomes (Mill 1863; Bentham 1789). A modern utilitarian, Peter Singer, has followed the logic to conclusions many find startling, arguing that the suffering of animals counts as fully as our own and that the affluent are obligated to give far more than they do (Singer 1975). Utilitarianism’s strength is its clarity and its refusal to play favorites. Its danger is that it can, in principle, justify sacrificing an individual for the greater good — which is exactly what some of the worst cases in this book involve.
Kantian ethics, named for Immanuel Kant, judges actions by duty rather than results. Its central command is to treat every person as an end in themselves, never merely as a means to someone else’s purpose (Kant 1785). Some things may not be done to a person even if doing them would help many others, because persons are not tools. This is the deepest objection to using patients as unwitting research material, and it underwrites the modern insistence on consent. Where the utilitarian asks “what produces the most good?”, the Kantian asks “what do we owe this person, regardless of the good?”
Virtue ethics, descending from Aristotle, shifts the question from the act to the agent. Instead of “what should I do?” it asks “what would a good person — honest, compassionate, courageous, just — do here, and what kind of person do I become by choosing this?” (Aristotle 340 BC). It captures something the other theories can miss: that character and habit, not just isolated decisions, are the substance of a moral life.
The ethics of care, developed by Carol Gilligan and others, starts from relationships rather than rules (Gilligan 1982). It notices that real moral life is lived among people who are dependent on one another — patient and nurse, parent and child — and that abstract principles can obscure the concrete obligations of those bonds. It is a natural lens for medicine, where so much of the work is relationship.
Put the lenses to work on a single case and the difference shows at once. Suppose a hospital has one ICU bed and two patients who need it. The utilitarian asks which choice saves more life and relieves more suffering overall. The Kantian asks whether either patient is being treated as a mere means — whether each is given the respect owed to a person, not weighed like cargo. The virtue ethicist asks what a just and compassionate clinician would do, and how she should carry the loss of whoever is not chosen. The care ethicist asks about the relationships and dependencies in the room — who is already in this clinician’s care, and what that bond demands. None of these questions is foolish, and they do not always agree.
These theories, then, are not rival machines that stamp out answers. They are ways of seeing, and a skilled reader learns to switch among them. Often the most useful question about a case is not “which theory is correct?” but “what does each lens reveal that the others hide?” Each one, in the end, can be read as a different account of why the four principles matter.
How to Read a Moral Argument
The cases in this book are built around arguments, and the single most useful skill for reading them is also the simplest: learning to take an argument apart.
An argument, in this sense, is not a quarrel. It is a set of reasons — called premises — offered in support of a conclusion. Laid out plainly, an argument looks like this:
- A competent adult has the right to refuse any medical treatment.
- This patient is a competent adult who refuses the treatment.
- Therefore, his refusal should be honored.
Setting an argument out in this standard form — premises first, conclusion last — is powerful because it makes disagreement locatable. Once the steps are visible, you can ask two distinct questions. First: does the conclusion actually follow from the premises, if the premises are true? (This is validity, a matter of logic.) Second: are the premises in fact true? (A valid argument with true premises is called sound.) An argument can be perfectly logical and still go wrong because one of its premises is false.
This gives the reader a precise tool. When two thoughtful people disagree about a case, they rarely disagree about everything. Usually they accept most of the steps and part ways over exactly one — a single premise that one believes and the other denies. Find that premise and you have found the real dispute. In the refusal argument above, almost everyone grants the first and third steps; the whole question turns on the second, on whether the patient is truly competent to refuse. That is where the argument should be pressed.
Throughout this book you will see arguments set out in this numbered form, in boxes, with the contested premise named. The point is never to win. It is to see, with as little fog as possible, where reasonable people actually divide — and to make you state which premise you would defend.
How the Rules Were Written
Many of the safeguards we now take for granted — that a patient must consent, that research must be reviewed, that subjects can walk away — are recent, and most were written in response to disaster. The history is worth knowing, because the cases in this book are the latest chapters in a long argument, not the first.
For most of medicine’s history, the doctor decided and the patient complied. The physician’s duty was beneficence, and consent as we understand it barely existed. The change began, brutally, at Nuremberg. After the Second World War, the trial of Nazi doctors who had performed lethal experiments on prisoners produced the Nuremberg Code of 1947, the first clear statement that the voluntary consent of the research subject is essential (Nuremberg Military Tribunals 1947). The world medical community followed, eventually, with the Declaration of Helsinki, the international standard for ethical research that is still revised today (World Medical Association 2024).
The codes did not end the abuses. In the United States, the Tuskegee Syphilis Study ran for forty years, into the 1970s, withholding effective treatment from hundreds of Black men so that researchers could observe the untreated course of the disease — without their informed consent, and after a cure existed. When it came to light, the outrage led to the Belmont Report of 1979, which distilled the ethics of human research into three principles that still govern it: respect for persons, beneficence, and justice (National Commission for the Protection of Human Subjects of Biomedical and Behavioral Research 1979). Belmont, in turn, gave us the Institutional Review Boards that must approve research with human subjects, and the modern apparatus of consent forms, risk assessment, and oversight (Jonsen 1998).
Other cases sharpened the same lessons. Henrietta Lacks, a Black woman who died of cancer in 1951, had cells taken without her knowledge that became one of the most important tools in the history of medicine — grown, sold, and studied for decades while her own family knew nothing and shared in none of it. Her story folds together every theme of this history at once: consent, justice, race, and the question of what we owe the people whose bodies make medical progress possible.
The same shift remade the ordinary clinic. The physician’s authority gave way to a partnership in which the patient’s values, not only the doctor’s judgment, direct the care. One useful way to see the change comes from Ezekiel and Linda Emanuel, who described four models of the relationship between doctor and patient (Emanuel and Emanuel 1992). In the paternalistic model, the physician decides what is best and acts on it — the old default. In the informative model, the doctor supplies facts and the patient alone chooses, a kind of vending-machine medicine. In the interpretive model, the doctor helps the patient understand what they truly want. In the deliberative model, doctor and patient reason together toward the best choice. The history of modern medical ethics is, in large part, a movement away from the first model — though which of the others should replace it is itself a live question, and several of the cases in this book turn on it.
At the center of that shift is informed consent — understood not as a signature on a form but as a process of disclosure and choice (Faden and Beauchamp 1986). For consent to be genuine, four things must hold: the patient must receive adequate disclosure of the relevant facts; must have real understanding of them; must choose voluntarily, free of coercion; and must have the capacity to decide (Appelbaum 2007). Capacity is more subtle than it looks — it is not about whether a patient agrees with the doctor, but about whether they can take in information, weigh it, and express a choice. A patient may have the capacity to refuse a flu shot but not to manage a complex cancer decision; capacity is specific to the choice at hand. Alongside consent stands confidentiality, the old promise that what a patient reveals will be protected — a promise now strained by databases, families, and public-health duties.
Return now to the nurse with the syringe. Her dilemma is not an accident of one bad shift. The same advances that gave medicine its new power over death — the drugs, the machines, the ability to hold dying open for hours or days — are what placed that choice in her hands at all; a century ago there would have been no range to titrate. And the rules built since Nuremberg, for all they reshaped, never resolved the oldest tension of the bedside: the duty to relieve suffering pulling against the duty never to be the cause of a patient’s death. She stands inside both the new powers and the ancient conflict. The cases that follow are, again and again, places where commitments like these collide.
Why Reason from Cases?
It would be possible to write an ethics book made only of principles and theories, with cases tucked in as examples. This book does the reverse, and the choice is deliberate.
Reasoning from cases has a long and respectable history. In medieval and early-modern ethics it was called casuistry — the practice of working out what is right by comparing the case at hand to clear examples whose rightness or wrongness is not in doubt. Casuistry fell into disrepute when it was abused to rationalize whatever a clever arguer wanted. But in the 1980s the philosophers Albert Jonsen and Stephen Toulmin revived it for bioethics, arguing that committees facing real medical dilemmas reached agreement not by deducing answers from grand theories, but by reasoning carefully from cases (Jonsen 1998). People who disagreed sharply about why something was wrong could still agree that it was — and could reason outward from there.
This matches how moral understanding actually grows. We rarely learn ethics by memorizing a rule and applying it. We learn by encountering a hard situation, feeling the pull of competing goods, watching how others reason, and refining our judgment against new cases. A principle learned in the abstract is inert until you have used it on something that resists. The cases in this book are that resistance — chosen because each one strains the principles in a different direction, so that working through the whole set builds a flexible, tested judgment rather than a list of memorized verdicts.
The Anatomy of a Case
Each case in this book follows the same shape, so that once you learn to read one, you can read them all.
Every chapter opens with an at-a-glance card — who, what, where, and why it matters — so you know the stakes within fifteen seconds. Then comes the story, told as carefully and concretely as the facts allow, with real names, dates, and details, because ethics done in the abstract is ethics done badly. Technical terms are explained where they first appear; you are never expected to arrive already knowing them.
The heart of each chapter is the argument the case started — a connected exchange of positions, laid out as a sequence of moves. One side states its case; the strongest objection answers it; a reply answers the objection; and so on, with the key arguments set out in standard form and the contested premise named at each step. The exchange is built to be fair: each position is given in its strongest version, in the voice of someone who actually holds it. A case in which one side is obviously right is not worth your time.
Each chapter ends with discussion questions and, deliberately, without a verdict. This is the book’s one firm rule. The cases are designed to open your judgment, not to close it. The final move of each argument leaves a question still live — because that is the truth of these problems, and because the point is to make you a better thinker, not to tell you what to think. You can read these chapters alone, pausing to argue with the page, or in a group, where the disagreement is the whole point.
A Note on How This Book Was Made
This book is a work of human–artificial intelligence collaboration, and it would be strange — in a book about honesty, consent, and the proper use of powerful tools — not to say so plainly.
The ideas, the structure, the selection of cases, the arguments, and the final judgment about every sentence are mine. Artificial-intelligence tools were used as an aid in drafting and in synthesizing material, much as earlier writers used research assistants and editors. I directed that work, supplied the expertise that shaped it, checked the facts and the sources, and take full responsibility for what remains — including any errors. The technology can assemble and rephrase; it cannot decide what is true or what matters, and I have not asked it to.
I disclose this for two reasons. The first is simple honesty about how the work was produced. The second is that this book argues, repeatedly, that powerful tools in medicine and science demand transparency about how they are used and who remains accountable for the results. It would be a poor argument if the book did not hold itself to the same standard.
Using and Sharing This Book
This book is an open educational resource. It is released under a Creative Commons Attribution–NonCommercial (CC BY-NC) license, which means you are free to read, share, copy, adapt, and teach from it without charge, for any non-commercial purpose, as long as you credit the source. Teachers may assign it, remix it, and build on it; students may keep it. Knowledge about how to think through these questions should not sit behind a paywall.
The collection is also meant to grow. New cases will be added over time as medicine raises new dilemmas — and medicine always does. Whichever cases you find here, the method is the same, and so is the invitation: read the story, weigh the arguments, find the premise you would defend, and decide what you think. Then hold that conclusion loosely enough to keep thinking. That is what it means to think with cases.