Definition
A force is a Law French phrase meaning "of necessity" or "by necessity." It appears in early common law pleading and legal writing as a term of compulsion — indicating that an act was done not by free choice but under the constraint of necessity or obligation. The phrase is archaic and does not appear as a functional term in modern legal practice. Its significance today is almost entirely historical and interpretive, encountered when reading medieval or early modern legal texts, Year Books, or authorities that draw on the Law French tradition.
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Common Language
Modern common usage (Wiktionary): "A force" in ordinary English most commonly appears as part of compound phrases — "a force to be reckoned with," "a force of nature" — denoting power, strength, or an active agency producing effects.
Historical common usage (Webster's 1913): "Force" is defined as strength or energy of any kind; active power; vigor; might. Also: violence, compulsion, or coercion exerted upon a person.
The gap between these common meanings and the legal term is significant. In ordinary English, "force" implies the application of power or pressure from without. The Law French phrase a force, by contrast, conveys internal legal necessity — the idea that an action was compelled by the demands of law or circumstance rather than by physical violence or external coercion. A researcher encountering "a force" in historical sources should not read it as a synonym for violence or physical compulsion.
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Common Confusion
A force should not be confused with force majeure, the doctrine excusing contractual performance due to extraordinary external events. Force majeure derives from French civil law tradition and operates as a substantive legal doctrine; a force is a Law French term of pleading or description, not a freestanding doctrine. Similarly, readers should not conflate a force with "duress" or "coercion" in the modern tort or contract sense. The necessity conveyed by a force is a general term of compulsion from early pleading — it does not map cleanly onto any single modern doctrine.
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Why It Matters in Research
Researchers will encounter a force almost exclusively in pre-nineteenth-century English legal sources — Year Books, Britton, Bracton-era texts, and authorities citing Law French authorities. The primary trap is misreading the phrase as a reference to physical force or violence rather than as a term signaling legal necessity. Burrill's citation to Britton (c. 119) places the phrase firmly within the feudal and early common law context; Britton is a late-thirteenth-century treatise on English law written in Law French, and researchers consulting that source should expect Law French terminology throughout.
The phrase has no direct modern descendant as a term of art, but the underlying concept — that certain acts are legally compelled or excused by necessity — flows into modern doctrines including necessity as a defense, force majeure in contracts, and the broader equitable treatment of unavoidable circumstances. When tracing the conceptual lineage of necessity-based doctrines through historical sources, a force may appear as an ancestor term without being labeled as such in secondary literature.
Because a force appears in only one source dictionary in the Law Mind corpus (Burrill's), its treatment in the historical record is sparse. Researchers should treat any occurrence in primary sources as requiring contextual interpretation against the surrounding Law French text rather than relying on a fixed doctrinal meaning.
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Historical Dictionary Support
Burrill's Law Dictionary provides the only corpus entry: "L. Fr. Of necessity. Britt. c. 119." The entry is spare, as is characteristic of Burrill's treatment of Law French terms that had fallen out of active use by the mid-nineteenth century. Burrill correctly identifies the source tradition (Law French) and the authority (Britton), but offers no elaboration on the range of contexts in which the phrase appeared or how it functioned in pleading. No other shelf sources in the Law Mind corpus address this term independently.
The brevity of the historical dictionary record reflects the term's status as a fossilized phrase by the time legal dictionaries were being systematically compiled. It was preserved in Burrill primarily as a reference aid for readers encountering the term in older authorities, not as a term with living doctrinal content.
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Encyclopedia Cross-Reference
contracts_74: Discharge — Force Majeure Clauses (Drafting and Enforcement), Law Mind Contracts & Commercial Law Encyclopedia — for researchers tracing the modern doctrine most conceptually adjacent to the necessity principle embedded in a force.
environmental_1: NEPA — Overview, Purpose, and the Action-Forcing Mechanism, Law Mind Environmental & Energy Law Encyclopedia — the "action-forcing" concept in NEPA is entirely unrelated historically but may be relevant for researchers using "force" as a search term across the corpus.
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