What Is Negligence? When Carelessness Becomes a Legal Wrong
By the BrainSnail editorial team. How these articles are written and checked, and how to tell us when one is wrong.
In August 1928 a woman in Paisley drank a bottle of ginger beer bought for her by a friend and, she said, found the remains of a decomposed snail in it. She had no contract with the cafe, because her friend had paid, and none with the manufacturer, whom she had never met. Whether she could sue him anyway went to the House of Lords, and the answer, in 1932, created the modern law of negligence, the branch of law that decides when one person's carelessness makes them liable for another's loss.
The neighbour principle
Before Donoghue v Stevenson, English law recognised duties of care only in particular relationships: innkeeper and guest, carrier and passenger, and so on. Lord Atkin's judgment in the snail case replaced the list with a principle. You must take reasonable care to avoid acts or omissions which you can reasonably foresee would be likely to injure your neighbour, and your neighbour is anyone so closely and directly affected by your act that you ought to have them in mind. A manufacturer who sends out a sealed bottle that no one will inspect before it is drunk owes a duty to the person who drinks it.
The case never established whether there was a snail. The House of Lords decided only that if the facts were as Mrs Donoghue said, she had a claim, and the manufacturer settled before trial. The principle it laid down has been applied since to doctors, drivers, employers, builders, solicitors, councils and the makers of everything.
The four elements
A claimant in negligence has to prove four things, and a case fails if any one of them is missing:
- •Duty: the defendant owed the claimant a duty of care, which for physical injury is now assumed in most everyday situations
- •Breach: the defendant fell below the standard of a reasonable person in their position, whether by doing something a careful person would not or by failing to do something they would
- •Causation: the breach caused the loss, usually tested by asking whether the harm would have happened but for the defendant's conduct
- •Damage: the claimant suffered a recognised kind of harm, such as injury, property damage or, within limits, financial loss
The reasonable person
The standard is objective. The question is not whether the defendant did their best but whether they did what a reasonable person would have done, and the reasonable person is neither perfect nor careless. A learner driver is judged by the standard of a competent driver, which seems harsh until one asks who should bear the cost of a learner's mistakes: the learner, who chose to drive, or the pedestrian, who did not. A professional is judged by the standard of a competent member of that profession, so a surgeon is asked whether a responsible body of surgeons would have acted the same way.
Courts weigh the likelihood of harm, how serious it would be, how costly it would have been to prevent, and the social value of what the defendant was doing. A cricket club whose balls cleared the fence a handful of times in thirty years was not negligent when one finally hit a passer-by; a factory that knew its floor was slippery and did nothing was.
Where the duty stops
The neighbour principle would make everyone liable to everyone if it were not limited, and most of the argument in negligence law since 1932 has been about where to stop. Pure financial loss, where nobody is hurt and nothing is damaged but money is lost, is recoverable only in narrower circumstances, because a careless statement could otherwise ruin an unlimited number of people who relied on it. Psychiatric harm to bystanders is limited to close relatives who witnessed the event or its immediate aftermath. And the law is reluctant to impose a duty to rescue: in most common-law countries a passer-by who watches a stranger drown commits no legal wrong, however great the moral one.
The remedy is damages, money to put the claimant as nearly as possible in the position they would have been in, and it is reduced where the claimant's own carelessness contributed to the harm. Someone who was not wearing a seat belt recovers less; someone who accepted a lift from a driver they knew to be drunk recovers less again.
Why it matters
Negligence is the law most people are most likely to meet. Road accidents, medical mistakes, injuries at work, faulty products and slips in shops are all negligence claims, and the standards the courts set feed back into how carefully drivers, doctors and manufacturers behave, because the cost of carelessness is charged to those who could have prevented it. Critics say it produces a compensation culture and defensive practice; defenders say that a rule requiring people to take reasonable care for their neighbours is about the least a legal system can ask.
The takeaway
Negligence is liability for harm caused by failing to take the care a reasonable person would have taken towards someone one ought to have had in mind, a principle established by the ginger-beer case of 1932. A claimant must show a duty, a breach of it, causation and recognised damage, the standard is objective, and the courts limit the duty where extending it would make liability unbounded.