Bioethics

What it asks

Medicine acts on people, often when they are least able to resist and sometimes when they cannot consent at all. That has always been true, and until recently there was no field examining it.

What made one necessary was a combination of capability and disclosure. Ventilators, dialysis and transplantation created decisions about who would live that had not previously been anyone's to make. And a series of research abuses became public - most notoriously a study that withheld available treatment from men with syphilis for decades - which destroyed the assumption that professional good intention was sufficient safeguard.

The field that resulted is unusually practical. Its central framework exists because hospital committees needed something to reason with.

The recurring problems

Consent and capacity. Consent legitimates almost everything in medicine, so what counts as informed, voluntary and competent carries enormous weight. Real patients are frightened, in pain and dependent on the person asking, which is not the condition the concept assumes.

Deciding for others. Children, the unconscious, and people with dementia are treated on someone else's judgement. Whether that judgement should reconstruct what the person would have wanted or determine what is best for them is a genuine dilemma when those diverge.

Allocation. Resources are finite, so someone is not treated. Whether to maximise years saved, prioritise the worst off, or run a lottery are different answers with different victims, and every health system implements one without saying so.

What we may do to bodies. Reproduction, gene editing, organ markets and end-of-life decisions each raise the question of whether some things should not be done even with consent - and answering yes requires a ground that does not simply restate a taboo.

How it developed

The Nuremberg Code in 1947, drafted in response to experiments conducted in the camps, established voluntary consent as an absolute requirement in research. It was widely regarded as applying to war criminals rather than to ordinary practice, which is precisely why the later scandals were possible.

The 1960s and 1970s made the questions unavoidable. Committees were formed to decide who received dialysis. Transplantation required a definition of death, which turned out to be a decision rather than a discovery. Research abuses in the United States became public and produced federal regulation and, in 1979, a report setting out the principles research must respect.

The same year, Beauchamp and Childress published the four-principles framework - respect for autonomy, non-maleficence, beneficence and justice. It was deliberately mid-level, compatible with several ethical theories and committed to none, which is why it spread: a committee can use it without agreeing about metaethics.

Since then each new capability has extended the field, and the pattern has held - the technology arrives, the framework is stretched, and the stretching is where the philosophy happens.

The positions within it

Principlism; casuistry; consequentialist and deontological approaches; virtue ethics in medicine; care ethics; feminist bioethics, which questions whose autonomy the framework was built around. All are in the Schools section.

Where it stands now

The field is institutionally embedded - committees, regulators, journals - and its main internal criticism is that this makes it a discipline of legitimation rather than of examination.

The active areas are genome editing, where the decisions are heritable, artificial intelligence in clinical decisions, and the allocation questions that a pandemic made public. Global health justice is the largest gap: almost all the field's canonical work assumes a well-resourced system.