Negligence: Actual and Proximate Causation
Negligence
Actual and Proximate Causation
Counterfactual cause, scope of liability, intervening events, and Palsgraf.
Structured Visual
Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.
RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.
Scope and honesty note
Jurisdiction: United States common-law overview with selected Texas statutory applications; as of 2026-08-28; jurisdictions and causes of action vary; not legal advice. Synthetic facts are classroom inputs, not findings. This lesson renders structure, refuses unsupported interpretation, cites, abstains, and hands off.
See the essential structure first
Start with this deliberately incomplete structure, then use the pinned authorities, worked application, exceptions, and handoff below. This deliberately incomplete preview has 5 nodes; exceptions and legal consequences remain in the sourced prose below.
Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.
RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.
Begin with the governing doctrine
Actual cause asks whether the injury would have occurred without the defendant's conduct, subject to doctrines for multiple sufficient causes and proof uncertainty. Proximate cause or scope of liability limits responsibility to harms sufficiently connected with the risks that made the conduct tortious. Intervening acts, foreseeability, type of harm, manner, plaintiff, and policy can matter. Duty, breach, actual cause, proximate cause, and damages remain separate elements even when facts overlap.
Pin the perceived-risk boundary
The Cardozo passage states the majority's relational duty boundary; the lesson identifies that framing rather than presenting it as a universal proximate-cause formula. Caption: Palsgraf v. Long Island Railroad; court: New York Court of Appeals; decision date: 1928-05-29. Verbatim opinion excerpt: “The risk reasonably to be perceived defines the duty to be obeyed, and risk imports relation; it is risk to another or to others within the range of apprehension” Source: 248 N.Y. 339; pinpoint 248 N.Y. at 344; https://www.neochart.com/catalog/cases/ny/volume_248/0339_01/index.html; data via neochart.com, snapshot 2026-08.
Pin breach variables as a contrast
The Hand-variable excerpt helps separate ex ante breach analysis from the later causal connection between conduct and harm. Caption: United States v. Carroll Towing Co.; court: United States Court of Appeals for the Second Circuit; decision date: 1947-01-09. Verbatim opinion excerpt: “Since there are occasions when every vessel will break from her moorings, and since, if she does, she becomes a menace to those about her; the owner’s duty, as in other similar situations, to provide against resulting injuries is a function of three variables: (1) The probability that she will break away; (2) the gravity of the resulting injury, if she does; (3) the burden of adequate precautions. Possibly it serves to bring this notion into relief to state it in algebraic terms: if the probability be called P; the injury, L; and the burden, B; liability depends upon whether B is less than L multiplied by P: i. e., whether B PL.” Source: 159 F.2d 169; https://www.neochart.com/catalog/cases/f2d/volume_159/0169_01/index.html; data via neochart.com, snapshot 2026-08.
Pin the synthetic fact pattern
The synthetic *Palsgraf* sequence records assistance to a passenger, a dropped ordinary-looking package, hidden fireworks, an explosion, a distant falling scale, and physical injury. Each event and uncertainty is separately timestamped in conceptual order.
Work the application
The trace first asks the appropriate actual-cause counterfactual. It then asks whether the injury falls within the legally relevant risk and handles the hidden contents and scale as possible intervening links. The majority's duty framing is kept distinct from alternative proximate-cause approaches. The graph never treats event reachability as legal causation.
Read the populated authority-and-fact record
The populated record carries the conduct, event chain, counterfactual, risk description, intervening links, claimant position, competing doctrinal frames, and unresolved fact questions. The rendered record contains 14 populated rows.
Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.
RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.
Read the complete record
The complete record keeps sources, stated facts, and questions for review separate. Authority records: Verbatim snapshot sources. 248 N.Y. 339: Palsgraf v. Long Island Railroad. 159 F.2d 169: United States v. Carroll Towing Co.. Synthetic facts: Classroom facts only. Conduct: Guard assists a passenger carrying an apparently ordinary package. Sequence: Package falls, hidden contents explode, distant scale falls, claimant is struck. Counterfactual: Record asks whether harm would have occurred absent the specified conduct. Intervening event: Hidden explosive contents and falling scale are separately recorded. Application trace: Elements, limits, and unresolved questions. Actual cause: But-for or multiple-sufficient-cause doctrine must match the jurisdiction and facts. Proximate cause: Scope of liability asks whether the harm and claimant fall within the risk. Duty distinction: Palsgraf majority frames foreseeability through duty before consequences. No shortcut: Temporal sequence and graph reachability do not establish legal causation.
Narrow summary
Prove actual cause before scope of liability, keep duty and breach distinct, and never substitute chronology or graph connectivity for legal causation.