Restatement (Second) of Torts: Negligence, Strict Liability, and Defenses

The Restatement (Second) of Torts is the American Law Institute’s organized statement of U.S. civil liability law, covering negligence, product defects, intentional harms, privacy violations, defamation, defenses, and damages. Published in volumes beginning in 1965, it is not a statute and has no force of its own. Courts use it anyway, often decisively, because its sections distill decades of case law into clear rules that judges and lawyers can argue from. If you are researching a tort claim or defense in any U.S. jurisdiction, there is a strong chance the Restatement will appear in the briefing or the opinion.

What the Restatement Is and Who Writes It

The American Law Institute (ALI), founded in 1923, produces every Restatement. Its membership of judges, practicing attorneys, and legal academics takes on areas where court decisions across jurisdictions have grown fragmented and tries to produce a single, well-reasoned statement of the rule.

Each project is led by one or more Reporters, who are legal scholars responsible for structuring the work, researching case law, and preparing drafts. The ALI deliberately avoids calling them “authors”: the job is to report the state of the law, not invent it. Reporters work with Advisers chosen for subject-matter expertise and a Members Consultative Group that reads drafts from a generalist’s perspective.¹

Nothing becomes the Institute’s official position until it has been approved by both the ALI Council and the full membership at an Annual Meeting.¹ That layered vetting is part of why courts take the finished text seriously.

How Much Weight It Carries in Court

The Restatement is secondary authority. It cannot decide a case on its own the way a statute or constitutional provision can. A section becomes binding law in a jurisdiction only when the state’s highest court formally adopts it into the common law. Once adopted, it functions like any other judicial precedent, and lower courts in that jurisdiction must follow it.

Even without formal adoption, judges routinely treat Restatement sections as persuasive authority. A lawyer facing a novel question will cite the Restatement to propose a principled resolution, and many courts find the reasoning compelling enough to apply. The practical consequence is that the Restatement shapes outcomes in jurisdictions that have never officially adopted it and serves as the baseline that most lawyers and judges reason from.

Negligence: The Core Framework

Negligence is the center of tort law, and the Restatement (Second) defines it as conduct that falls below the standard the law establishes for protecting others against unreasonable risk of harm.² The yardstick is the hypothetical reasonable person: someone who exercises the care a prudent individual would use under the same circumstances. A plaintiff must prove four elements: duty, breach, causation, and actual damages.

Causation: Substantial Factor and Foreseeability

Causation runs on two layers. Section 431 requires that the defendant’s negligence be a “substantial factor” in bringing about the harm, which keeps liability tethered to conduct that genuinely contributed to the outcome rather than tangential acts that happened to precede the injury.³

The second layer is proximate cause, which limits liability by foreseeability. A defendant is not responsible for bizarre or unforeseeable consequences of careless conduct. Sections 448 and 449 address intervening acts: criminal or negligent acts by third parties do not automatically break the chain if those acts were a foreseeable consequence of the defendant’s original negligence.⁴ A landlord’s failure to install locks that leads to a foreseeable break-in is the standard illustration.

Res Ipsa Loquitur

Sometimes negligence is obvious from the event itself without direct evidence of what the defendant did wrong. Section 328D codifies res ipsa loquitur, which lets a jury infer negligence when three conditions are met: the event is the kind that does not ordinarily happen without negligence, other possible causes have been sufficiently ruled out by the evidence, and the indicated negligence falls within the scope of the defendant’s duty to the plaintiff.⁵ A surgical instrument left inside a patient is the classic case. Nobody has to prove which member of the operating team was careless; the object’s presence does the work.

Strict Liability

Product Defects Under Section 402A

Section 402A is one of the most frequently cited provisions in all of tort law. It holds that a seller engaged in the business of selling a product is liable for physical harm to a user or consumer when the product reaches them in a defective condition that is unreasonably dangerous. Two features make the rule powerful. The seller does not need to have been negligent; the rule applies even if the seller “exercised all possible care in the preparation and sale” of the product. And the injured person does not need a direct contractual relationship with the seller.⁶

The focus is on the product’s condition at the time of sale, not the manufacturer’s behavior. A defect is unreasonably dangerous when it poses risks beyond what an ordinary consumer would expect. The standard covers manufacturing flaws, design problems, and inadequate warnings or instructions. Product misuse by the consumer can reduce or eliminate liability. A plaintiff has a duty to use ordinary care and to protect themselves from known or readily apparent dangers; using a product in a way contrary to its intended purpose, where that misuse contributes to the injury, can reduce or bar recovery.

Abnormally Dangerous Activities

Section 519 extends strict liability beyond products to activities that carry inherent danger no amount of care can eliminate. Section 520 sets out six factors courts weigh in deciding whether an activity qualifies: the degree of risk involved, the likely severity of harm, whether reasonable care can eliminate the risk, how common the activity is, whether the activity is appropriate for the location, and whether the activity’s value to the community is outweighed by its dangers.⁷

Storing explosives near a residential area or handling highly toxic chemicals in a populated zone are textbook examples. The actor bears the financial consequences of resulting harm regardless of precautions taken. The policy rationale is that the entity profiting from a high-risk activity should absorb its costs rather than shifting them to neighbors or bystanders who had no say in the matter.

Intentional Torts

Intentional torts involve deliberate acts, not careless ones. The Restatement (Second) defines several core categories:

Battery: intentional harmful or offensive contact with another person without consent.
Assault: conduct that creates a reasonable fear of immediate harmful or offensive contact, even without physical touch.
False imprisonment: unlawful restraint of a person’s physical freedom within boundaries set by the defendant. A locked room is not required; blocking the only exit or threatening force to prevent someone from leaving can be enough.

Each requires that the defendant intended the act, though not necessarily the exact injury that resulted. A shove meant as a joke is still battery if it breaks the victim’s wrist.

Intentional Infliction of Emotional Distress

Section 46 covers conduct so extreme that it causes severe emotional harm. The threshold is high: the behavior must be “so outrageous in character, and so extreme in degree, as to go beyond all possible bounds of decency” and be regarded as “atrocious, and utterly intolerable in a civilized community.”⁸ Rudeness, insults, and annoyances do not qualify. The plaintiff must show the defendant acted intentionally or recklessly, the conduct was genuinely outrageous, and the resulting distress was severe. Courts decide as a threshold matter whether the alleged conduct could reasonably be regarded as extreme and outrageous before a jury weighs in.

The Four Privacy Torts

The Restatement (Second) played a significant role in formalizing privacy law by defining four separate torts, each protecting against a different kind of invasion. These categories appear in Sections 652B through 652D and remain central to how courts handle privacy claims today.

Intrusion upon seclusion (Section 652B): intentionally intruding on another’s solitude or private affairs in a way that would be highly offensive to a reasonable person. The intrusion can be physical, like forcing entry into a home, or technological, like tapping a phone or reading private emails.⁹
Appropriation of name or likeness (Section 652C): using another person’s name or likeness for your own use or benefit without permission. Commercial use in advertising is the most common form, but the rule is not limited to commercial gain.⁹
Public disclosure of private facts (Section 652D): giving publicity to someone’s private life in a way that would be highly offensive to a reasonable person and is not a matter of legitimate public concern. “Publicity” means broadcasting to the public at large, not telling one person.⁹
False light: publishing information that places a person before the public in a misleading and highly offensive way. This overlaps with defamation but protects against a wider range of misrepresentations.

Victims of these torts typically seek compensatory damages for emotional distress, reputational harm, or economic losses. Awards vary with the severity of the invasion and the degree of malice involved.

Defamation

Section 558 sets out the elements of a defamation claim: a false and defamatory statement about the plaintiff, an unprivileged publication of that statement to at least one other person, fault on the publisher’s part amounting to at least negligence, and either that the statement is actionable on its face or that it caused special (usually financial) harm.

The distinction between libel (written) and slander (spoken) matters at the damages stage. Libel is generally actionable without proof of special harm. Slander typically requires the plaintiff to show concrete financial loss unless the statement falls into recognized categories like accusing someone of a crime or attacking their professional competence. The Restatement’s framework provides the common-law foundation that constitutional defamation rules sit on top of.

Defenses That Can Defeat a Claim

The Restatement (Second) devotes substantial attention to defenses. Knowing them matters as much as knowing the underlying torts, because a valid defense can turn a strong-looking claim into a losing one.

Contributory Negligence

Under traditional contributory negligence, a plaintiff who bears any fault for their own injury is completely barred from recovering. One percent of plaintiff fault wipes out a claim against a defendant who was ninety-nine percent at fault. Most jurisdictions have replaced this harsh rule with comparative fault systems that reduce damages in proportion to the plaintiff’s share of responsibility, but a slim minority still follow pure contributory negligence. The Restatement (Second) reflects the older framework; the Restatement (Third) of Torts: Apportionment of Liability handles comparative fault.

The “last clear chance” doctrine survives from the contributory negligence era. It allows a negligent plaintiff to recover if the defendant was the only party who could have prevented the harm through reasonable action and failed to do so.

Assumption of Risk

A plaintiff who voluntarily accepted a known risk may be barred from recovering for injuries that fall within that risk. Express assumption of risk operates through a signed waiver, like those required before skydiving or joining a gym. Implied assumption of risk arises when a person’s conduct shows they understood and accepted the danger, such as playing a contact sport knowing collisions are inherent to it.

Courts further distinguish primary from secondary assumption of risk. Primary means the defendant never owed a duty of care in the first place, which is why a baseball fan hit by a foul ball generally cannot sue the team. Secondary means the defendant did owe a duty but the plaintiff knowingly encountered the danger anyway; in most jurisdictions that scenario is now analyzed under comparative fault rather than as a complete bar.

Self-Defense and Defense of Others

Sections 63 through 76 establish the privilege to use reasonable force in self-defense. A person may use force not intended or likely to cause death or serious bodily harm to defend against what they reasonably believe is an imminent harmful or offensive contact. This privilege exists even if retreat was possible.¹⁰

Deadly force is more restricted. It is privileged only when a person reasonably believes they face death, serious bodily harm, or sexual assault that cannot be safely prevented any other way. The privilege to use deadly force generally does not apply if the person can retreat with complete safety, with one major exception: there is no duty to retreat from your own home unless the attacker also lives there. Section 70 caps the overall principle: no one may use more force than they reasonably believe is necessary for protection. Section 76 extends the same framework to defending a third person on conditions that mirror the rules for self-defense.¹⁰

Damages Under the Restatement

Tort damages fall into three categories. Compensatory damages aim to make the plaintiff whole by covering economic losses like medical bills, lost income, and property repair, as well as non-economic harm like pain, suffering, and emotional distress. Nominal damages acknowledge that a legal right was violated where the plaintiff cannot prove significant harm. Punitive damages serve a separate purpose.

Section 908 defines punitive damages as damages awarded to punish a defendant for outrageous conduct and to deter similar behavior. They are not available in ordinary negligence cases. The defendant’s conduct must be more culpable than careless, typically involving malice, fraud, or conscious disregard for the safety of others. Courts have wide discretion in setting amounts, within constitutional limits requiring a reasonable relationship between punitive awards and the compensatory damages and severity of the misconduct.

The Restatement also recognizes a plaintiff’s duty to mitigate. An injured person cannot sit back and let losses mount when reasonable steps would reduce them. If you refuse medical treatment that would have shortened your recovery, a court may reduce damages by the amount that could have been avoided. The duty is one of reasonableness, not perfection; no one is expected to take extraordinary or risky measures.

Where the Restatement (Third) Has Taken Over

The ALI has been gradually publishing the Restatement (Third) of Torts in specialized volumes. Completed volumes now cover Products Liability, Apportionment of Liability, Liability for Physical and Emotional Harm, and Liability for Economic Harm, with a volume on Miscellaneous Provisions recently approved.¹¹ The Third Restatement does not replace the Second wholesale. It updates specific areas where the law has evolved since the mid-twentieth century.

Products liability is the most notable departure. The Third Restatement moves away from Section 402A’s single “unreasonably dangerous” standard and draws sharper distinctions among manufacturing defects, design defects, and failures to warn. For design defect claims, it shifts toward a risk-utility analysis that asks whether a reasonable alternative design would have reduced the risk, whereas the Second relied more heavily on ordinary consumer expectations. Many jurisdictions have adopted the Third Restatement’s products liability framework; others still follow 402A.

On causation, the Third Restatement abandons the “superseding cause” language from the Second but reaches similar conclusions. Defendants remain liable for all harm that results from the risks that made their conduct negligent in the first place, even when intervening actors contribute to the injury.⁴ The Apportionment volume formally incorporates comparative responsibility, allowing courts to divide fault among multiple parties rather than applying the all-or-nothing approach of contributory negligence.

For anyone working on a tort case, tracking which version your jurisdiction follows is not optional. A court that has adopted the Third Restatement for product defects may still follow the Second for general negligence or privacy. The reliable way to know is to check recent appellate decisions in the jurisdiction for which sections they cite. Building a case on the wrong edition is the kind of mistake that does not usually get a second chance.

1
The American Law Institute. Frequently Asked Questions
2
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3
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4
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Open Casebook. Restatement (2d.) 328D Res Ipsa Loquitur
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The Climate Change and Public Health Law Site. Restatement (Second) of Torts – s 402A and 402B
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H2O. Restatement (2d.) 520 – Abnormally Dangerous Activities
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The Climate Change and Public Health Law Site. Elements of Intentional Infliction of Emotional Distress
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The American Law Institute. Restatement of the Law, Second, Torts
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OpenCasebook. Restatement (Second) of Torts on Self-Defense
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The American Law Institute. Torts – Miscellaneous Provisions Is Approved