Definition
A Latin phrase meaning "voluntary madman." A legal term of art applied historically to a person who has rendered himself mentally incapacitated through voluntary intoxication. The phrase was used by Lord Coke to distinguish the drunkard from the true lunatic: whereas the lunatic suffers madness without fault, the drunkard has willingly embraced a temporary loss of reason. The condition was therefore treated with less legal sympathy than genuine mental incapacity, and the law declined to excuse conduct or void obligations on grounds of a self-induced mental state.
Common Language
Modern common usage (Wiktionary): No entry. The phrase is archaic Latin with no current common usage.
Historical common usage (Webster's 1913): No entry. The phrase did not circulate outside legal and ecclesiastical Latin.
Because the term is pure legal Latin with no common counterpart, the distinction between legal and common meaning does not arise. The phrase is encountered only in historical legal sources.
Common Confusion
Voluntarius damon is sometimes loosely conflated with general incapacity doctrines, but the two concepts move in opposite directions. Incapacity doctrine typically excuses or voids legal acts on the ground that a party lacked mental competence. Voluntarius damon, by contrast, was invoked precisely to deny that excuse: voluntary intoxication was the cause, and therefore the law refused to treat the drunkard as legally equivalent to a lunatic. Researchers should also distinguish voluntarius damon from the modern voluntary intoxication defense in criminal law, which is a distinct and jurisdiction-specific doctrine with its own analytical framework.
Why It Matters in Research
This term appears almost exclusively in early common law sources and commentaries drawing on Coke and Blackstone. Researchers encountering it in historical materials should understand that it reflects a moral taxonomy embedded in pre-modern English law — one that sorted mental incapacity by culpability rather than clinical condition. The phrase carries normative freight: it is not merely descriptive but signals legal consequences, specifically the denial of protections available to the involuntary lunatic.
Several research traps exist. First, the term appears only in its Latin form in the sources; English-language indexes to historical treatises will not surface it under "voluntary madman" or "drunkard." Second, because the phrase is associated with contract capacity, criminal responsibility, and testamentary capacity simultaneously, researchers must determine which legal context is operative in the source they are reading. Third, modern legal databases rarely index this term, so finding its use in judicial opinions requires full-text searching in digitized historical reports rather than headnote-based retrieval.
The concept connects to the broader corpus of mental incapacity law, where the Law Mind holdings on lunacy, non compos mentis, and contractual capacity provide essential context. The moral framing of voluntarius damon also anticipates debates in criminal law over whether self-induced incapacity should mitigate or aggravate liability — a question that remains live in modern jurisdictions.
Historical Dictionary Support
Black's Law Dictionary (2nd Ed.) is the sole source in the Law Mind corpus for this term, and its entry is terse but accurate. Black's attributes the phrase directly to Lord Coke (Co. Litt. 247) and corroborates it with Blackstone (4 Bl. Comm. 25), both of which are real and verifiable sources. The Coke citation refers to Coke on Littleton, his commentary on Littleton's Tenures, and the Blackstone citation refers to the fourth volume of Commentaries on the Laws of England treating public wrongs.
No other historical dictionary in the Law Mind corpus includes this term. Its absence from Bouvier's and from later editions of Black's reflects the phrase's obsolescence as a working legal term rather than any doubt about its historical authenticity. The concept it described was absorbed into modern doctrines of voluntary intoxication without preserving the Latin label.
The Black's entry is reliable as far as it goes, but researchers should note what it does not say: it does not explain the legal consequences that attached to the characterization, the range of proceedings in which the doctrine applied, or whether any distinction was drawn between habitual drunkards and those temporarily intoxicated. Those questions require direct engagement with Coke and Blackstone themselves.
Jurisdictional Note
Voluntarius damon is an English common law term and has no direct counterpart in civil law or Scottish law traditions. American courts absorbed the underlying concept through the common law inheritance but did not adopt the Latin phrase. Researchers working in American legal history will find the concept operative but the terminology absent from domestic sources.