Definition
In law, ingratitude refers to conduct by a recipient of a gift or benefit — or by a freed person toward a former master — that is sufficiently serious to justify legal revocation of the gift or return to a prior legal status. Unlike its moral counterpart, legal ingratitude is not mere thanklessness but a recognized cause of action or legal ground for rescission in certain civil law systems. The concept carries no independent significance in common law, but operates as a formal legal doctrine in Roman law and in jurisdictions descended from it, particularly France and other civil law countries.
Common Language
Modern common usage (Wiktionary): A lack or absence of gratitude; thanklessness.
Historical common usage (Webster's 1913): Want of gratitude; insensibility to, forgetfulness of, or ill return for, kindness or favors received; unthankfulness; ungratefulness.
The gap between common and legal meaning is pronounced. In ordinary usage, ingratitude is a character failing — a moral or social reproach. In law, it is a technical trigger: specific conduct meeting a defined threshold that empowers a donor to undo a completed transaction. The emotional sense of ingratitude (mere coldness or failure to acknowledge a kindness) is legally irrelevant; the doctrine requires something closer to active wrongdoing or serious offense against the donor.
Common Confusion
Ingratitude as a legal concept is sometimes conflated with general grounds for gift revocation, such as fraud, duress, or failure of consideration. These are distinct. Ingratitude doctrine does not depend on a defect in the original transaction — the gift was validly made — but on subsequent conduct by the recipient that the law treats as forfeiting the benefit already received. Researchers working in civil law contexts should distinguish ingratitude-based revocation from conditional gifts, where return is triggered by failure of a specified condition attached to the original transfer.
Why It Matters in Research
Ingratitude as a legal doctrine is a civil law phenomenon. Researchers working in common law sources — English cases, American treatises, early colonial records — will find no parallel doctrine and no operative legal meaning. The term appears in common law sources, if at all, only in its moral or rhetorical sense.
The significance of the doctrine is concentrated in Roman law sources and in French civil law, which preserved and codified the Roman rule. The French Civil Code (Code civil) includes express provisions for revocation of donations on grounds of ingratitude, specifying defined acts — such as an attempt on the donor's life, serious cruelty, or grave injury — that qualify. This statutory specificity is what separates civil law ingratitude doctrine from vague moral judgment.
For Law Mind corpus researchers, the practical trap is anachronism and jurisdictional mismatch. An entry encountering "ingratitude" in a pre-modern legal text must determine whether the source is drawing on Roman law as authority, applying French or Spanish civil law, or simply invoking the term rhetorically. In Louisiana, which retains a civil law heritage, ingratitude-based revocation of donations has had operative legal force. The same passage in a Massachusetts equity opinion would carry no such weight.
Researchers should also note that the doctrine of ingratitude in the freedman context — Roman law permitting return to slavery for ingratitude toward a patron — has no modern legal analog and appears in historical sources only. Encountering this usage requires careful contextualization; it reflects a legal world in which personal status was itself revocable, a concept alien to modern law.
Historical Dictionary Support
Both editions of Black's Law Dictionary handle ingratitude briefly and in near-identical terms, treating it as a Roman law principle carried forward into French law rather than as a living common law concept. The entry in both editions notes that ingratitude was sufficient cause in Roman law to revoke a gift or recall the liberty of a freedman, and that French law preserves this principle.
What the historical dictionaries do not provide is any treatment of the specific acts that qualify as ingratitude under civil law systems, the procedural mechanics of revocation, or the doctrine's ongoing application in civil law jurisdictions. The entries function as a pointer to Roman and French law rather than a substantive analysis. Researchers needing the operational content of the doctrine — what conduct qualifies, what form revocation must take, whether heirs may invoke it — must go beyond Black's to the primary civil law sources.
The second edition entry appears in a section also addressing ingenuus (freeborn persons), and the ingratitude passage is fragmentary in the surviving text, cutting off at "a sufficient" before completing the thought. This is a transcription artifact researchers should note when relying on that edition; the first edition carries the complete formulation.
Jurisdictional Note
The doctrine has no operative role in common law jurisdictions. In Louisiana, civil law tradition gives ingratitude-based revocation potential legal force, though researchers should verify current statutory status. Civilian jurisdictions in Europe and Latin America that trace their law to the French Civil Code or directly to Roman sources will have their own codified versions of the rule, which may differ in the specific conduct they enumerate as qualifying ingratitude.