Definition
The Lex Fufia Caninia was a Roman statute enacted in 2 B.C. (sometimes cited as A.D. 8 in older sources, though modern scholarship places it at 2 B.C.) that imposed strict numerical limits on the manumission of slaves by will (testamentary manumission). The law responded to concerns that the practice of freeing slaves upon a master's death had become so widespread that the freedman class was growing too large and too rapidly, diluting Roman citizenship and creating social instability.
Under the statute, the number of slaves an owner could free by testament was capped according to a sliding fractional scale tied to the total size of the owner's slaveholding. A master who owned more than two but no more than ten slaves could free up to half of them by will. An owner of more than ten but no more than thirty could free up to one-third. Larger holdings were subject to progressively smaller fractions. An absolute ceiling applied regardless of the fraction, and no owner — however wealthy — could manumit more than one hundred slaves by will. Owners of only one or two slaves were unaffected and could free them without restriction. The law applied only to testamentary manumission; manumission inter vivos (during the owner's lifetime) was regulated separately and was not subject to the same fractional caps.
The Lex Fufia Caninia was eventually abrogated by Justinian in A.D. 530 or 531 as part of his broader liberalization of manumission law, on the ground that it was contrary to the spirit of freedom.
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Common Confusion
The Lex Fufia Caninia is sometimes conflated with the Lex Aelia Sentia (A.D. 4), the other major Augustan-era manumission statute. These are distinct laws. The Lex Aelia Sentia imposed age requirements on both the manumitting owner and the slave, established a council to oversee certain manumissions, and addressed the status of slaves freed in fraud of creditors. The Lex Fufia Caninia dealt exclusively with numerical limits on testamentary manumission. Both statutes operated simultaneously, and a testamentary manumission had to comply with both.
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Why It Matters in Research
Researchers working with Roman law sources — whether primary texts, civil law treatises, or comparative legal history — should be alert to several issues this term raises.
First, the date. Bouvier's Law Dictionary gives A.D. 8, but the dominant modern scholarly consensus places the enactment at 2 B.C. Entries in older legal dictionaries and some nineteenth-century civilian treatises will carry the earlier or otherwise varying date. When the date matters to an argument about Augustan legislative chronology or the sequencing of manumission reforms, verify against specialized Roman law scholarship rather than relying on the dictionary source alone.
Second, the fractional scale. Bouvier's entry is incomplete as preserved — the text breaks off mid-sentence. Researchers using only Bouvier will not find the full scale there. The complete scheme is preserved in Gaius's Institutes (I.42–46) and in Justinian's Digest and Institutes. Any research into the precise mechanics of the caps must go to those primary sources.
Third, the abrogation. The law was repealed by Justinian, which means it has no operative force in any system deriving from the Corpus Juris Civilis as received law. Its significance in later legal research is historical and comparative, not doctrinal. Civil law jurisdictions that look to Roman sources do not apply the Lex Fufia Caninia as living law.
Fourth, for researchers working in legal history or comparative slavery studies, the law is a key data point in the broader Augustan legislative program governing the slave-citizen boundary. It connects to debates about the social function of Roman manumission, the legal construction of freedom, and the relationship between private testamentary power and public social policy — themes that recur in scholarship on later slave societies that drew on Roman models.
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Historical Dictionary Support
Bouvier's Law Dictionary identifies the statute correctly as a Roman law restricting testamentary manumission and notes the social rationale — the freedman class was considered too numerous. Bouvier begins to reproduce the fractional scale but the entry as preserved is truncated, cutting off at the rule for owners of more than ten and not more than thirty slaves.
No other dictionary sources were submitted for this entry. The gap in Bouvier is significant: researchers relying solely on it will have an incomplete picture of the operative rules. The Institutes of Gaius, available in translation, remains the most accessible primary source for the full text of the scale. Justinian's own abrogation is noted in his Institutes (I.7) and provides the clearest statement of the law's eventual fate.
Bouvier does not address the distinction between testamentary and inter vivos manumission, nor the interaction with the Lex Aelia Sentia. Both omissions matter for research contexts.
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Jurisdictional Note
The Lex Fufia Caninia is a matter of Roman legal history with no direct application in any modern jurisdiction. It may appear in civil law scholarship, Roman law courses, and comparative legal history. Researchers in Scottish, South African, or Louisiana legal history — systems with significant Roman law foundations — may encounter it in historical sources but will not find it cited as operative authority.
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Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Roman Law; Slavery and Manumission in Roman Law; Augustan Legislative Reforms; Justinian's Corpus Juris Civilis
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