Strict Liability

Strict liability is limited, not universal

Strict liability does not mean liability for every accident or serious injury. It removes the need to prove unreasonable conduct in particular settings, but the plaintiff must still establish the elements of the governing doctrine and a causal connection to the harm. A defendant may also raise defenses recognized for that category.

Abnormally dangerous activities

A person who carries on an abnormally dangerous activity may be strictly liable for harm resulting from the characteristic risk that makes the activity dangerous. Relevant factors include the high degree of risk, likelihood of serious harm, inability to eliminate the risk through reasonable care, uncommon usage, appropriateness to the location and community value weighed against the danger. The activity must be unusual and exceptionally risky, not merely careless or hazardous if mishandled.

Blasting is a classic example because substantial risk of serious harm may remain despite precautions. The defendant is not strictly liable for every harm occurring at the site; the injury must arise from the activity's characteristic danger. If a blast damages nearby windows through flying debris, that harm is within the relevant risk. A worker's unrelated slip on an office floor is not.

Animals

A possessor of a wild animal is generally strictly liable for harm caused by the kind of danger characteristic of that animal, even if the possessor used care. A domestic animal ordinarily creates strict liability when the possessor knew or had reason to know of its dangerous propensity. Ordinary negligence may apply when a known risk is handled carelessly, and statutory rules can vary.

A dog that has never shown dangerous behavior does not automatically create strict liability merely because it bites. The animal's category, the possessor's knowledge and the causal relationship to the injury matter. The injured person's knowing encounter with a danger may raise assumption-of-risk issues.

Products liability

A commercial seller can be strictly liable for selling a defective product that causes physical harm when the product reaches the user without a substantial change. A manufacturing defect departs from the intended design. A design defect concerns an unreasonably dangerous design under the governing test. A warning defect involves inadequate instructions or warnings about foreseeable risks.

The plaintiff generally must show a defect existed when the product left the defendant's control, the product was being used in a reasonably foreseeable manner, and the defect actually and proximately caused injury. The strict-liability claim does not require proof that the seller failed to use reasonable care, but negligence and warranty theories may be separately available.

Manufacturing defect

A single bicycle with a cracked frame caused by a production error can be defective even if the design and inspection process were reasonable. Compare the unit with the product's intended specifications or ordinary expectations. The defect, not carelessness in general, supplies the strict-liability basis.

Design defect

A design defect affects an entire product line. Jurisdictions use different tests, including consumer expectations or risk-utility analysis. The MBE may specify the governing approach. Under risk-utility analysis, consider foreseeable risks, the product's utility and whether a safer reasonable alternative design was feasible.

Warning defect

A warning must address foreseeable risks that are not obvious and communicate safe use. A prescription-drug manufacturer may satisfy its duty by warning the prescribing physician, who serves as a learned intermediary, subject to exceptions. A warning does not cure every design or manufacturing defect, and the plaintiff must connect the warning's inadequacy to the injury.

Causation and defenses

Strict liability still requires actual and proximate cause. Misuse can defeat or reduce recovery if it was unforeseeable or contributed to the harm under the applicable comparative-fault rule. Assumption of a known risk may be a defense. A plaintiff's mere failure to discover a defect or use due care is not treated identically in every jurisdiction; apply the stated rule rather than assuming negligence defenses transfer unchanged.

Compare with negligence

Negligence asks whether the defendant used reasonable care. Strict liability asks whether the defendant engaged in a covered activity, possessed a qualifying animal or sold a defective product, and whether the characteristic risk or defect caused the injury. A seller may be careful and still face products liability. Conversely, an unsafe product does not prove that every seller in the chain is legally responsible under every jurisdiction's rules.

On a question, name the category first. Then identify the defect or characteristic risk, the relevant causal link, and the available defense. Do not stop at ‘strict liability applies’ when the facts make scope or misuse decisive.

Strict liability removes breach, not every other element

Strict liability means the plaintiff need not prove that the defendant acted unreasonably in the relevant respect. The plaintiff still must establish a recognized strict-liability category, causation, legally cognizable harm and any required connection to the defendant's activity or product. A dangerous result alone does not create strict liability.

Abnormally dangerous activities

An activity may be abnormally dangerous when it creates a foreseeable and highly significant risk of physical harm even with reasonable care and is not a matter of common usage. Courts consider the degree of risk, severity of potential harm, ability to eliminate risk through care, commonness of the activity, appropriateness to the place and community value. The doctrine is narrow and activity-specific.

Blasting near occupied homes can support strict liability because severe harm remains possible despite precautions and vibration damage is characteristic of the activity. A trucking company transporting ordinary fuel on public highways is not automatically strictly liable simply because the cargo is hazardous; transportation may be common and risks may be managed through care. Compare the activity's residual risk and context, not only the substance's danger.

Liability extends to the kind of harm that makes the activity abnormally dangerous. If blasting causes nearby foundations to crack from vibration, the harm is within the relevant risk. If a worker is injured by an unrelated falling tree, the activity's strict liability does not replace ordinary causation analysis. The defendant can argue that the plaintiff's conduct or an extraordinary intervening event caused harm outside the characteristic risk.

Animals and characteristic risks

A possessor of a wild animal is generally strictly liable for harm caused by the kind of danger characteristic of that animal, even if the possessor used great care and complied with regulations. Keeping a tiger safely does not eliminate responsibility if the tiger attacks. The doctrine does not necessarily cover harm unrelated to the animal's dangerous propensity, such as a visitor tripping over a feed bucket.

For domestic animals, strict liability generally depends on the possessor's knowledge of a dangerous propensity abnormal to the class, sometimes called the one-bite rule. A dog need not literally have bitten before; prior lunging, snapping or other conduct may provide notice. If the owner had no reason to know of a propensity and the dog behaves ordinarily, negligence may still be considered but strict scienter liability may fail.

A plaintiff who knowingly and unreasonably encounters an animal's danger may face a defense, depending on the jurisdiction. Trespass and provocation can also affect liability. Analyze the animal category, the possessor's knowledge where relevant, the type of harm, and the plaintiff's conduct separately.

Products liability theories are distinct

Strict products liability generally requires a commercial seller, a defective product, causation and injury. A defect can be in manufacture, design or warnings. A manufacturing defect means the product departed from its intended design even if care was used. Design-defect tests vary: consumer expectations, risk-utility, or a combination may apply. Warning defect analysis asks whether a reasonable warning would address a foreseeable risk and whether its absence caused the harm.

A bicycle with a brake assembled incorrectly at the factory may have a manufacturing defect because it differs from identical units. A bicycle built exactly as designed may have a design defect if the design creates an unreasonable risk that a feasible safer alternative could reduce under the governing test. These are different theories: one compares the product with its intended specifications, the other challenges the specifications themselves.

A warning defect does not make a manufacturer an insurer against every misuse. Consider foreseeable uses and misuses, the user's knowledge, the warning's clarity and whether an adequate warning would have changed conduct. A learned intermediary may affect warnings for prescription products. A sophisticated purchaser's knowledge can also matter. State the warning theory and causal link rather than simply asserting that more information would have been helpful.

Defenses and scope of liability

Comparative fault may reduce recovery in many strict-liability settings, although jurisdictions differ in how they treat plaintiff conduct. Assumption of a known risk may bar or reduce recovery when the plaintiff voluntarily encounters it. Product alteration or unforeseeable misuse can break causation or defeat defect proof; ordinary foreseeable misuse does not automatically absolve the seller.

A seller generally must be in the business of selling the product for strict products liability to apply. A casual one-time seller of a used appliance is not treated like a manufacturer or retailer. Commercial distribution can include manufacturers, wholesalers and retailers, even without direct privity between the injured user and manufacturer.

Separate strict liability from negligence and warranty. A plaintiff can allege negligent design based on unreasonable conduct, strict liability based on a product defect, and breach of warranty based on a contractual assurance or statutory rule. The theories may overlap in facts but have different elements and defenses. On an exam, identify the category first, then test defect, causation, scope and defenses.