Negligence
Negligence is the cornerstone of modern tort law, representing a fundamental legal concept that determines liability for unintentional harm. At its core, negligence is the failure to exercise the standard of care that a reasonably prudent person would have exercised in a similar situation, resulting in harm to another.
Negligence forms the basis for the vast majority of personal injury lawsuits. It dictates when an individual or entity can be held legally responsible for accidents, mistakes, or omissions that cause damage. The goal is twofold: to compensate victims for their losses and to incentivize responsible conduct.
Where This Fits in 1L Torts: Negligence is typically introduced after intentional torts. It represents a shift from analyzing a defendant's subjective intent to an objective assessment of their conduct against a societal standard. It also contrasts with strict liability, where fault is not a prerequisite for liability.
2Key Definitions
Negligence
The failure to exercise the care that a reasonably prudent person would exercise in like circumstances.
Duty of Care
A legal obligation requiring adherence to a standard of reasonable care while performing acts that could foreseeably harm others.
Breach of Duty
A violation of the duty of care; occurs when the defendant's conduct falls below the established standard of care.
Reasonable Person Standard
An objective, hypothetical standard against which a defendant's conduct is measured. Not a real person but a legal benchmark.
Actual Cause
The direct causal link between the defendant's breach and the plaintiff's injury, typically determined by the "but-for" test.
Proximate Cause
A legal limitation on actual cause requiring that the harm be a foreseeable result of the defendant's breach.
Foreseeability
The ability to reasonably anticipate the likely results of an action or inaction. Crucial for both duty and proximate cause.
Damages
Monetary compensation awarded to a plaintiff for harm suffered as a result of the defendant's negligence.
Res Ipsa Loquitur
"The thing speaks for itself" — allows a jury to infer negligence when the accident wouldn't ordinarily occur without it.
Negligence Per Se
A doctrine treating violation of a statute as automatic breach if the statute protected against the type of harm suffered.
Contributory Negligence
A common law defense that completely bars recovery if the plaintiff's own negligence contributed in any way.
Comparative Negligence
A modern defense that reduces the plaintiff's damages in proportion to their own percentage of fault.
Assumption of Risk
A defense where the plaintiff voluntarily and knowingly encountered a known danger.
Eggshell Skull Rule
A defendant takes their victim as they find them — liable for the full extent of injuries, even with pre-existing conditions.
3Elements of Negligence
To establish a prima facie case, a plaintiff must prove five distinct elements by a preponderance of the evidence:
1. Duty of Care
The plaintiff must demonstrate that the defendant owed them a legal duty to exercise reasonable care. A duty is owed to all foreseeable plaintiffs whenever conduct creates a risk of harm. The standard is that of a “reasonably prudent person” under the circumstances (Palsgraf v. Long Island Railroad).
2. Breach of Duty
The plaintiff must prove the defendant's conduct fell below the applicable standard of care. The “reasonable person” standard is objective. Consider: probability of harm, severity of harm, burden of precautions (Hand Formula: B < P × L), and social utility of the conduct.
3. Actual Cause (Cause-in-Fact)
The plaintiff must show a factual link between the breach and injury. The primary test is the “but-for” test: the injury would not have occurred but for the defendant's negligent act. For multiple causes, courts may use the substantial factor test.
4. Proximate Cause (Legal Cause)
Even if actual cause is established, the injury must be a foreseeable result of the defendant's negligent conduct. This limits liability to harms within the scope of the risk created. An unforeseeable, extraordinary intervening event may be a superseding cause that breaks the chain.
5. Damages
The plaintiff must prove actual, legally recognizable harm. Unlike intentional torts, negligence requires actual injury (no nominal damages). Types include compensatory damages (medical expenses, lost wages, pain and suffering) and, rarely, punitive damages for gross negligence.
4Duty Analysis
General Duty of Care
Every person owes a duty to act as a reasonably prudent person would. The standard is objective — it does not consider the defendant's individual shortcomings. However, it does consider:
- Physical characteristics: A reasonable person with the defendant's physical attributes (e.g., blindness)
- Emergency: A reasonable person acting in an emergency not of their own making
- Children: Held to the standard of a reasonably prudent child of similar age and experience, unless engaged in an adult activity
Special Relationships
Common Carriers & Innkeepers
Owe a high duty of care to passengers/guests.
Landowners → Invitees
Highest duty — must inspect for and warn of or make safe known and discoverable dangers.
Landowners → Licensees
Duty to warn of or make safe known dangers. No duty to inspect.
Landowners → Trespassers
Generally no duty except to refrain from willful or wanton misconduct. Attractive nuisance exception for children.
Employer-Employee
Duty to provide a safe workplace.
Parent-Child
Duty to supervise children to prevent harm to others.
Duty to Rescue (Nonfeasance)
Generally, there is no affirmative duty to act or rescue a stranger in peril, even if one could do so easily.
Exceptions:
- Special relationship: Parent-child, common carrier-passenger, invitor-invitee
- Defendant creates the peril: Even if non-negligently
- Undertaking to act: Must do so with reasonable care and not leave person in worse position
- Contract: A contractual obligation to act
Professional Negligence (Malpractice)
Professionals (doctors, lawyers, architects) are held to a higher standard — the knowledge, skill, and care of a reasonably prudent member of their profession.
- Modern trend is toward a national standard for many professions, especially specialists
- Establishing the standard almost always requires expert testimony
5Causation Deep Dive
Actual Cause (Cause-in-Fact)
“But-For” Causation
The injury would not have occurred but for the defendant's negligent act. This is the most common test. If removing the defendant's act from the sequence means the injury would not have happened, causation is established.
Substantial Factor Test
Used when multiple causes, each alone sufficient, combine to cause harm. The “but-for” test fails here because neither act is individually necessary. Instead: was the defendant's conduct a substantial factor in causing the harm? (Anderson v. Minneapolis, St. P. & S. Ste. M. Ry. Co., 1927).
Alternative Causes (Summers v. Tice)
When multiple defendants are negligent but it's impossible to tell which one caused the injury, the burden of proof shifts to the defendants. If they cannot prove they were not the cause, they are held jointly and severally liable.
Proximate Cause (Legal Cause)
Foreseeability Rule (Palsgraf)
The defendant is only liable for injuries that are the natural and probable consequences of their negligent act. The harm must be of a type that was foreseeable. The question is not whether the exact sequence was foreseeable, but whether the type of harm to the type of plaintiff was foreseeable.
Intervening & Superseding Causes
Foreseeable intervening causes (medical malpractice, rescuer negligence, subsequent accidents) do NOT break the chain. Unforeseeable, extraordinary intervening causes (acts of God, criminal acts by third parties) generally DO break the chain and are superseding causes.
Once proximate cause is established, the defendant is liable for the full extent of the plaintiff's injuries, even if a pre-existing condition made them more susceptible. The defendant “takes their victim as they find them.”
6Defenses to Negligence
Contributory Negligence (Minority Rule)
If the plaintiff's own negligence contributed in any way to their injury, no matter how slight, they are completely barred from recovery. Only a few jurisdictions still follow this harsh rule.
Last Clear Chance: An exception — if the defendant had the last clear chance to avoid the accident but failed to do so, the plaintiff's contributory negligence does not bar recovery.
Comparative Negligence (Majority Rule)
Pure Comparative Negligence
Damages reduced by plaintiff's percentage of fault, regardless of how high. A plaintiff 90% at fault with
Modified Comparative Negligence
Damages reduced by plaintiff's fault, but recovery is barred if fault exceeds a threshold. 50% Bar Rule: Recovery barred if fault is 51%+. 51% Bar Rule: Recovery barred if fault is 50%+. This is the most common form.
Assumption of Risk
Express Assumption of Risk
The plaintiff explicitly agrees (usually via waiver) to relieve the defendant of a duty of care. Courts may not enforce waivers that violate public policy, involve essential services, or are unconscionable.
Implied Assumption of Risk
Primary: Plaintiff voluntarily participates in an activity with inherent risks (e.g., baseball, skiing). Acts as a complete bar because it negates the duty element. Secondary: Plaintiff knowingly encounters a risk created by defendant's negligence — usually merged into comparative negligence.
7Worked Examples
Basic Negligence
Duty, Breach, Actual Cause, Proximate Cause, Damages
David, while texting, drives at 45 mph in a 25 mph zone. He swerves, hits a parked car, and collides with Paul, a pedestrian on the sidewalk, breaking Paul's leg.
Duty: David owed a duty as a driver to exercise reasonable care to pedestrians, including Paul — a foreseeable plaintiff on the sidewalk.
Breach: Texting while driving and speeding excessively (45 in a 25 zone). A reasonably prudent driver would not engage in such behavior.
Actual Cause: But for David's texting and speeding, he would not have swerved and collided with Paul.
Proximate Cause: Highly foreseeable that speeding and distracted driving in a residential area could cause physical injury to a pedestrian.
Damages: Broken leg requiring medical treatment and causing pain and suffering.
Conclusion: Paul can successfully establish a prima facie case of negligence against David.
Proximate Cause
Intervening/Superseding Cause
Sarah negligently leaves an unsecured tarp on her roof. A sudden, unpredicted hurricane-force gust rips it off, smashing through neighbor Tom's window, causing $5,000 in damage.
Duty & Breach: Sarah likely owed a duty to secure her tarp, and leaving it unsecured may constitute a breach.
Actual Cause: But for Sarah leaving the tarp unsecured, it would not have damaged Tom's window.
Proximate Cause: While foreseeable that an unsecured tarp might blow off in strong wind, a sudden, unpredicted hurricane-force gust is an extraordinary and unforeseeable intervening event — a superseding cause that breaks the chain of proximate causation.
Conclusion: Tom will likely fail to establish proximate cause because the hurricane-force gust was a superseding cause.
Negligence Per Se
Statutory Violation Analysis
A leash ordinance requires dogs to be leashed in parks. Mark lets his dog Buster run off-leash. Buster knocks over Lily, a child, causing a concussion.
Statutory Violation: Mark violated the leash ordinance.
Purpose of Statute: The ordinance is designed to prevent incidents like dog bites and knockdowns — protecting public safety, especially children.
Class of Persons: Lily, a child in the park, is within the protected class.
Type of Harm: A concussion from being knocked over is precisely the type of harm the ordinance was designed to prevent.
Conclusion: Lily can establish negligence per se, satisfying duty and breach. She must still prove causation and damages.
Comparative Negligence
Modified 51% Bar Rule Calculation
Peter jogs at night without reflective gear. Donna, speeding, hits him. Jury: Peter 40% at fault, Donna 60%. Total damages: $50,000. Jurisdiction follows modified comparative negligence (51% bar).
Plaintiff's Fault: Peter was found 40% at fault.
Threshold Check: Since 40% < 50%, Peter is not barred from recovery.
Damage Reduction: $50,000 × 0.40 =