Roman Tort Law: When Romans Wronged Each Other
Roman law recognized that people harmed each other in ways that were not crimes but that required legal remedy, and it organized those harms into a category called delict — from delinquere, to fail or offend — that is the ancestor of what common law systems call tort. The Roman law of delict was not a unified system imposed from above but a collection of specific wrongs that had accumulated through centuries of legal development, each with its own history, elements, and remedies, organized into a coherent framework by the juristic tradition that had the intellectual ambition to see the categories whole. What the jurists built was not only practically useful to Romans seeking legal remedies but was the foundation of civil liability doctrine in legal systems that still operate today.
The oldest and most fundamental Roman delict was iniuria — literally, wrongdoing against a person — which covered a range of non-consensual physical and dignitary harms. The Twelve Tables’ original provision addressed physical injury in terms that appear straightforward: specific body parts damaged by specific acts generated specific fixed monetary penalties. By the classical period, the Praetor’s edict had substantially expanded iniuria to cover insults, defamation, and violations of personal dignity that did not involve physical contact but were nonetheless understood as harms to the person’s social standing requiring legal remedy. A man who publicly insulted another, or who followed a respectable woman through the streets making suggestive remarks, or who called out to a man’s slaves in ways that implied their master’s dishonor — all of these could give rise to an action for iniuria. The remedy was a money penalty assessed by the judge according to the circumstances, with the standing of both parties relevant to its calculation.
The lex Aquilia, passed in 286 BC, was the foundational statute of Roman property damage law, and its juristic elaboration over the following centuries produced the most sophisticated treatment of civil liability for negligently or intentionally caused property damage in the ancient world. The statute covered three chapters: the killing of another’s slave or four-footed herd animal, the fraudulent destruction of another’s property, and the wounding of another’s slave or herd animal. The liability provision required the defendant to pay the highest value the thing had had in the past year — a recovery measure that went beyond actual loss to deter deliberate harm to high-value property.
The jurists’ treatment of the lex Aquilia reveals the sophistication of their thinking about causation and fault. The central question was the meaning of the statute’s requirement that the harm be caused corpore corpori — by body to body, by direct physical contact. Over time this was interpreted to require that the defendant’s own body had directly caused the harm: pushing someone into a river counted; hiring someone to push them did not, because the hirer’s act was too remote. But the jurists also developed the actio in factum — an action in the specific facts — to cover cases that the strict statutory language excluded but that were morally equivalent: a physician who abandoned a patient midway through treatment causing the patient’s death was not literally within the Aquilian text but was within its spirit, and the praetor created a remedy to address the gap.
Furtum — theft — was categorized as a delict rather than a crime, which reflects the Roman preference for private legal remedies over public prosecution for what we would consider criminal conduct. The victim of theft could bring a civil action for double or quadruple the value of what was taken, depending on the circumstances of the theft, in addition to recovering the thing itself. This private civil remedy existed alongside the possibility of criminal prosecution, and the choice between them was the victim’s to make based on what outcome they wanted and what evidence they had. The jurists debated the precise requirements for furtum extensively: what counted as the requisite dishonest intent, whether a borrower who used a thing differently than authorized committed theft of the use, whether finding a thing and keeping it was furtum — and their debates produced a doctrine of considerable precision.
The Roman approach to liability for harm caused by dangerous animals, defective buildings, and things thrown from windows shows practical legal reasoning at work. The actio de pauperie held the owner of an animal that caused harm strictly liable — without requiring proof of fault — for the damage it caused. The actio de deiectis vel effusis held whoever occupied the floor from which something was thrown or poured liable for the harm it caused to people on the street below, again without requiring proof of the specific person who threw it: the occupant was liable because the occupant controlled the space and therefore was best positioned to prevent the harm. These strict liability provisions are not the naive responses of a system that hadn’t thought about fault; they are deliberate policy choices about which party should bear the cost of certain categories of harm based on considerations of who was best positioned to prevent them.
The transmission of Roman delict law into modern legal systems is less direct than the transmission of Roman contract law, partly because the common law of tort developed substantially independently of the Roman tradition. But in civil law systems, the Aquilian tradition informs modern tort doctrine in ways that specialists trace through the civilian law codes. The requirement of fault — dolus or culpa — as a basis for liability for harm to persons and property; the concept of contributory fault reducing recovery; the categories of harm that trigger strict liability regardless of fault: all of these have Roman antecedents that civil law scholarship acknowledges even when the specific rules have been substantially modified in transmission.