Roman delicts and modern tort — comparative reflections

Roman delictual liability emerged through three nominate actions—furtum (theft), iniuria (insult/assault), and damnum iniuria datum (wrongful damage under the lex Aquilia)—each with distinct formulae, not a unified 'tort' concept. The lex Aquilia (c.287 BC) required culpa (fault) for liability, marking a shift from archaic strict liability toward fault-based regimes. Through praetorian innovation (actiones utiles, in factum actions) and juristic interpretation, liability expanded beyond literal statutory requirements to cover indirect causation and broader notions of harm. This casuistic, incremental method—reasoning by analogy from specific fact-patterns rather than deducing from general principles—established foundational concepts (fault, causation, wrongfulness) that shaped both civilian codes and common law tort, though modern systems developed general liability principles unknown to Rome.

D. 9.2.11 pr. (Ulpian): A barber shaving a slave near ball-players was struck, causing the razor to slit the slave's throat; Proculus held the barber liable for culpa in choosing an unsuitable location. Establishes objective fault standard and foreseeability.

D. 9.2.31 (Paul): A tree-pruner who gave warning before a branch fell was not liable; culpa required failure to take reasonable precautions. Refined the standard of care and role of warnings.

D. 9.2.7.8 (Ulpian citing Julian): A surgeon who operated negligently then abandoned treatment was liable for both commission and omission. Extended Aquilian liability to omissions where duty assumed.

D. 9.2.4 pr (Gaius): Established that iniuria in the lex Aquilia requires culpa (fault), not merely unlawful conduct. Fundamental for fault-based liability.

D. 9.2.7.4 (Ulpian): One who pushed another causing him to crush a slave could be liable either directly or through actio utilis. Shows early grappling with causation and intermediate acts.

Courts/examiners test delictual liability through formulaic analysis. First, identify the relevant action (actio furti, actio iniuriarum, actio legis Aquiliae). For Aquilian claims, establish: (1) defendant killed/damaged plaintiff's property; (2) conduct was iniuria (wrongful—lacking justification like self-defence); (3) culpa existed (measured objectively against bonus paterfamilias standard). Causation requires corpori corpore (direct physical contact) for statutory action, though actiones utiles cover indirect damage. Calculate damages: highest value within year (Chapter 1) or 30 days (Chapter 3). For furtum, prove contrectatio (handling) plus animus furandi (intent to steal, including unauthorised use). For iniuria, assess affront to dignitas flexibly. Note overlapping remedies—one act may ground multiple actions.

Students conflate Roman noxal liability with modern vicarious liability—noxal reflected potestas and allowed surrender of the wrongdoer, not enterprise risk. Avoid anachronistic projection of modern negligence onto Roman culpa. Cite sources precisely (D. 9.2.11 pr., not 'Ulpian says') and distinguish periods—classical jurists required fault for lex Aquilia, but archaic law retained strict liability pockets. Never treat Justinian's Institutes as pure classical law; they contain interpolations. The formula 'Roman law was penal, modern tort compensatory' oversimplifies—Aquilian damages often tracked actual loss, while modern law retains deterrent functions.