A civil-wrong concept defining liability rules for compensating harm or preventing wrongful interference with protected interests. It specifies required elements such as duty, prohibited conduct, causation, and legally cognizable harm or defines protection of commercial and intangible interests where applicable. It does not impose liability where the required element set is not satisfied or where recognized privileges or defenses apply. It allocates responsibility for injury or interference and shapes the scope and measure of monetary and equitable relief. The concept is generally stable, though doctrinal refinements and statutory updates may alter elements or defenses over time.

Principle

Determine whether the defendant owed a duty to the plaintiff, whether the defendant breached that duty by falling below the applicable standard of care, and whether that breach factually and legally caused compensable harm; some jurisdictions employ cost‑benefit balancing (e.g., Hand formula) or specialized professional standards.

Demonstration

A surgeon leaves a surgical instrument inside a patient after an otherwise routine operation. The retained instrument causes infection and requires further surgery. This scenario illustrates a breach of the professional standard and both factual causation (instrument caused infection) and legal causation leading to damages.

Misapplication

Treating any accident or mistake as negligence without comparing conduct to the appropriate standard of care; or conflating negligence with intentional wrongdoing or strict liability where different doctrines apply.

Consequence

A proven claim of negligence entitles the injured party to compensatory remedies (medical costs, lost earnings, pain and suffering) and promotes deterrence and safer conduct by holding individuals and organizations accountable to objective standards.

Reversal

If reversed, negligence would be treated as nonactionable even when objective standards are violated, or conversely, ordinary mistakes would be elevated to intentional wrongdoing, upending the normative distinctions in tort law.

Boundary

Applies to a broad range of civil wrongs where fault and reasonableness govern liability; it does not encompass strict‑liability offenses or intentional torts whose elements and policy rationales differ, and professional or statutory standards can modify the applicable duty analysis.

Semantic Tension

Tension exists between ordinary negligence, gross negligence, negligence per se, and strict liability; courts debate the extent to which negligence should be judged objectively versus with some consideration of the defendant’s knowledge or capabilities.

Synthesis

Negligence is the core fault‑based doctrine in tort law that measures conduct against community or professional standards and, where that conduct falls short and causes harm, provides compensation and incentives for safer behavior.