Liability — Meaning, Conditions & Causation — Jurisprudence Notes

Liability — Meaning, Conditions & Causation

A man throws a lit firecracker into a crowded market. It lands on a stall; the stallholder, to save himself, flings it away; it lands on another; he flings it away; it finally explodes in a bystander’s face. Who is liable — the last thrower, or the first? The old case Scott v Shepherd (1773) answered: the first man, because the whole chain of harm flowed from his wrongful act. That question — who must answer for the harm, and why — is the question of liability.

What liability is, its conditions, and causation

Everyday hook: liability is the legal “bill” that lands on you when you break a duty and harm results — the law’s way of saying you, and not the victim, must bear the cost. Liability is the bond of necessity that exists between the wrongdoer and the remedy of the wrong — the condition of being answerable in law for an act or omission. It arises, as Salmond put it, out of a wrong (a breach of a legal duty).

The conditions (essentials) for imposing liability — the law asks, in order:

1. A wrongful act or omission (the actus reus). There must first be an act — a voluntary human conduct — or an omission to do what a legal duty required. Mere thoughts or intentions, without an act, create no liability.

2. Causation (the chain of causation). The wrongful act must have caused the harm — there must be an unbroken link between the act and the injury. The law asks whether the act was the cause in fact (the harm would not have happened “but for” it) and the proximate (legal) cause (the harm was not too remote a consequence). A novus actus interveniens [a new intervening act] that breaks the chain may relieve the first wrongdoer.

3. The mental element (mens rea / fault), where the law requires it. For most serious wrongs the law also asks whether the wrongdoer had a guilty mind — intention, or at least negligence. (Some wrongs, “strict liability”, dispense with this — see Topic 4.)

4. Harm / damage, where the wrong requires it (most torts need actual damage; some rights are protected without proof of damage — see Topic 7).

Why causation matters (the essay’s core). Causation is the bridge between the wrong and the liability: no matter how wrongful the act or how guilty the mind, there is no liability unless the act caused the harm complained of. The law traces the “chain of causation” from act to injury; if the chain is unbroken, the first wrongdoer answers for all its natural consequences (Scott v Shepherd (1773)); if a free, voluntary intervening act breaks it, the chain — and the liability — may stop there.

Kinds of liability:

• Civil vs Criminal liability. Civil liability is enforced by a civil proceeding and results in a remedy to the plaintiff (damages, injunction). Criminal liability is enforced by the state and results in punishment.
• Remedial vs Penal liability. Remedial liability aims to enforce the plaintiff’s right — to make good the harm (specific performance, damages to compensate). Penal liability aims to punish the wrongdoer (a fine or imprisonment); it arises where the wrong is also an offence.

Salmond: “Liability is the bond of necessity that exists between the wrongdoer and the remedy of the wrong. It arises from a wrong or breach of duty, and is either civil or criminal, remedial or penal.”

In Simple Terms: Liability is being answerable in law for a wrong. To impose it the law needs a wrongful act, that the act caused the harm (the chain of causation), and — usually — a guilty mind. Liability is civil (remedy) or criminal (punishment), remedial (enforce the right) or penal (punish the wrong).

🧩 WORKED EXAMPLE — Following the chain of causation

Facts. A negligently leaves an open manhole unguarded. B, walking carefully at night, falls in and is injured. In a variation, C deliberately pushes B into the manhole.

Rule. Liability needs a wrongful act that causes the harm; a free, deliberate intervening act (novus actus) may break the chain.

Apply. In the first case, A’s negligent omission is the direct cause of B’s fall — the chain is unbroken, A is liable. In the variation, C’s deliberate push is a novus actus interveniens that breaks the chain — the injury now flows from C’s act, and A’s liability is displaced (or reduced).

Conclusion. The same open manhole produces liability in one case and not the other — because causation, not just the wrongful act, decides who answers. That is why the chain of causation is central.

flowchart TD
    LI["LIABILITY<br/>answerable for a wrong"]:::root
    LI --> W["Wrongful act / omission"]:::leaf
    LI --> C["Causation<br/>unbroken chain, act -> harm"]:::leaf
    LI --> M["Mental element (mens rea) — usually"]:::leaf
    LI --> H["Harm / damage — where required"]:::leaf
    LI --> K{"Kinds"}:::dec
    K -->|"civil / criminal"| K1["remedy vs punishment"]:::leaf
    K -->|"remedial / penal"| K2["enforce right vs punish"]:::leaf
    classDef root fill:#FFF8DC,stroke:#000,stroke-width:1px,color:#000;
    classDef leaf fill:#E6F3FF,stroke:#1E3A8A,color:#000;
    classDef dec fill:#FFE8C2,stroke:#B45309,color:#000;
    linkStyle default stroke:#888,stroke-width:1px;

Case Laws

• Scott v Shepherd (1773) — the “squib case”: the original wrongdoer is liable for harm through an unbroken chain of instinctive intervening acts.
• Rylands v Fletcher (1868) — liability can arise without fault where a dangerous thing escapes (strict liability — Topic 4).

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