8.1 Negligence, Torts, and Legal Liability
Key Takeaways
- Liability coverage attaches only when the insured is 'legally obligated to pay damages' — the trigger phrase in CG 00 01.
- Negligence requires all four elements: duty, breach, proximate cause, and damages. Missing one defeats the claim.
- Torts divide into negligence, intentional torts (usually excluded), and strict liability (insurable despite no fault).
- Proximate cause adds a foreseeability test; an unforeseeable intervening cause can break the chain of liability.
- Liability also arises by statute (dram shop, workers comp) and by contract (insured contracts/hold-harmless clauses).
Why Liability Insurance Exists
Liability insurance responds when an insured becomes legally obligated to pay damages to a third party. The trigger is not simply that someone got hurt or property was damaged. Coverage attaches only when the insured is legally liable. The Commercial General Liability (CGL) coverage form CG 00 01 (current ISO edition) states that the insurer will pay sums the insured "becomes legally obligated to pay as damages." That phrase is the gatekeeper for the entire liability product line, so the exam tests whether you understand the legal foundation underneath it.
Legal liability arises from three sources: torts, contracts, and statutes. The overwhelming majority of liability claims sound in tort, and within tort law the dominant theory is negligence.
The Three Branches of Tort Law
A tort is a civil wrong (other than a breach of contract) for which the law provides a remedy in the form of money damages. Torts fall into three categories:
| Tort category | Description | Example | Insurable? |
|---|---|---|---|
| Negligence | Failure to use reasonable care; unintentional | Customer slips on unmarked wet floor | Yes, the core of liability insurance |
| Intentional tort | A deliberate act causing harm | Assault, libel, false imprisonment | Generally excluded; narrow exceptions (personal injury offenses) |
| Strict (absolute) liability | Liability without fault for ultra-hazardous activity | Blasting, keeping dangerous animals, defective product | Yes, products and certain operations |
Note the exam trap: intentional acts are usually excluded because insurance covers fortuitous (accidental) loss, not deliberate harm. Strict liability still produces insurable claims even though no negligence need be proven, because the defendant did not intend the harm.
The Four Elements of Negligence
To recover for negligence, a claimant must prove all four elements. Missing even one defeats the claim:
- Duty owed to the claimant (a legal obligation to act with reasonable care, e.g., a store owes customers a safe premises).
- Breach of that duty (the defendant failed to meet the standard of a reasonably prudent person).
- Proximate cause (an unbroken chain links the breach to the injury, without which the harm would not have occurred).
- Damages (actual, measurable harm — bodily injury or property damage).
Memory aid: Duty, Breach, Cause, Damages. The standard against which breach is measured is the "reasonably prudent person" standard, an objective benchmark of how a careful person would have acted under the same circumstances.
Proximate Cause and Foreseeability
Proximate cause (also called legal cause) is the element candidates most often misread. It is not merely "the thing that physically caused" the harm — that is cause in fact. Proximate cause adds a foreseeability test: the harm must have been a reasonably foreseeable consequence of the breach. An intervening cause that is unforeseeable can break the chain and relieve the defendant of liability.
Example: A contractor leaves an open trench unmarked overnight. A pedestrian falls in and is injured — foreseeable, so the contractor is liable. If instead a meteorite strikes the same pedestrian, the trench is a cause in fact (they were standing there) but not the proximate cause.
Tying the Four Elements to a Defense Verdict
A negligence claim succeeds only if the plaintiff proves all four elements — duty, breach, causation (actual and proximate), and damages. Knock out any one and the claim fails, which is exactly how liability insurers defend. The exam frequently presents a scenario missing one element and asks why there is no liability.
| Element | Plaintiff must show | Insurer defense if absent |
|---|---|---|
| Duty | A legal obligation of care existed | No relationship/duty owed |
| Breach | Defendant fell below the standard | Acted reasonably |
| Causation | Breach in fact and proximately caused harm | Intervening cause / too remote |
| Damages | Actual injury or loss occurred | No measurable harm |
Worked example: a store mops a floor, posts a clear "Wet Floor" sign, and a customer who ignores it slips. Duty and arguably causation exist, but the store likely did not breach the standard of care because it gave reasonable warning — so the negligence claim fails on the breach element even though an injury occurred.
Strict Liability, Negligence Per Se, and Res Ipsa Loquitur
Beyond ordinary negligence, three doctrines expand or ease liability. Strict (absolute) liability imposes responsibility without fault for abnormally dangerous activities (blasting, keeping wild animals) and for defective products — the plaintiff need not prove the defendant was careless, only that the activity or product caused the harm. Negligence per se treats violation of a safety statute as automatic breach of the standard of care if the plaintiff is in the class the law protects.
Res ipsa loquitur ("the thing speaks for itself") lets a plaintiff establish a presumption of negligence when the harm would not ordinarily occur without negligence, the instrumentality was in the defendant's exclusive control, and the plaintiff did not contribute — a surgical instrument left inside a patient is the classic case.
These doctrines matter to insurance because they determine whether the products-completed operations hazard, the occurrence definition, and the duty to defend are triggered under a general-liability policy, and they explain why manufacturers buy products liability coverage even when they exercise great care.
A plaintiff proves the defendant owed a duty, breached it, and that the plaintiff was within the zone of foreseeable harm, but cannot show any measurable injury or property damage. Can the plaintiff recover for negligence?
Standards of Care and Statutory Liability
The standard of care varies with the relationship. A common carrier (airline, bus line) owes the highest degree of care to passengers. A property owner owes different duties to invitees (business customers, highest duty), licensees (social guests), and trespassers (lowest duty). Statutory liability is imposed directly by law — workers compensation statutes, dram shop laws holding alcohol servers liable, and product safety statutes are common examples. Negligence per se treats violation of a safety statute (e.g., running a red light) as automatic breach of duty, leaving only causation and damages to prove.
A bar continues serving alcohol to a visibly intoxicated patron who then injures a third party while driving. The bar is held liable under a state dram shop law. This is an example of:
Contractual Liability
Insureds can also assume liability by contract — for example, a tenant agreeing to hold a landlord harmless in a lease (a hold-harmless agreement). The CGL covers this through "insured contracts," a defined term that includes leases of premises, sidetrack agreements, and the tort liability of another assumed in a contract. Liability the insured assumes outside these defined insured contracts is generally excluded, which is why producers must read indemnity clauses carefully.