Definition
Latin term meaning courtesy, civility, or comity. In legal usage, comitas refers to the principle by which the courts or sovereign of one nation voluntarily recognize and give effect to the laws and judicial acts of another nation, not as a matter of strict legal obligation, but as a matter of goodwill and mutual respect among sovereign states.
The concept appears most commonly in its extended form: comitas inter communitates or comitas inter gentes — comity between communities or between nations. The operative word is "voluntarily": comitas is not a binding duty but a discretionary accommodation, extended insofar as doing so does not prejudice the interests of the recognizing state.
Burrill's formulation captures the governing limitation precisely: comitas is to be observed quatenus sine praejudicio indulgentium fieri potest — as far as can be done without prejudice to those granting the indulgence. This phrase is not mere flourish; it is the functional boundary of the doctrine.
Common Language
Modern common usage (Wiktionary): "Comitas" has no meaningful entry in modern general dictionaries. It is a Latin word with no independent life in modern English.
Historical common usage (Webster's 1913): Not listed as an English word. Treated as Latin source vocabulary only.
The term is pure legal and scholarly Latin. Researchers encountering it in historical texts should treat it as a technical term of art equivalent to "comity" and cross-reference accordingly. Its appearance in English-language legal writing typically signals a civil law influence or an author invoking the classical European doctrine of private international law.
Common Confusion
Comitas is frequently used interchangeably with "comity" in both historical and modern sources, and for practical purposes they are the same concept. The distinction worth noting is register: comitas appears in formal and theoretical writing, often in treatises discussing private international law or conflict of laws in their classical form, while "comity" is the working term in modern judicial opinions. Researchers should not treat comitas as a more technical or narrowly defined variant — the doctrinal content is identical.
Why It Matters in Research
The primary research trap is treating comitas as a separate legal doctrine from comity. It is not. It is the Latin source term from which the English doctrine takes its name and theoretical grounding. When historical sources, particularly 18th and 19th century treatises and digests, use comitas, they are invoking the same doctrine that modern courts call comity.
The citation to 2 Kent's Commentaries 457 appears uniformly across all three historical dictionary sources. James Kent's treatment of comitas in his Commentaries on American Law was the foundational American exposition of the doctrine, drawing heavily on the earlier work of the Dutch jurist Ulrich Huber and his maxims on the conflict of laws. Researchers working on the history of conflict of laws or private international law in American jurisprudence should treat the Kent citation as the primary bridge between European civilian theory and American common law development.
Corpus researchers should note that the term comitas will appear almost exclusively in pre-20th century sources. Post-1900, the Latin form drops out of American legal writing almost entirely in favor of "comity." A search for comitas in modern materials will return near-zero results; the research trail must be followed through the English synonym.
The qualifying phrase sine praejudicio — without prejudice to the recognizing state — is substantively important and frequently omitted in summary definitions. It explains why courts can refuse to apply foreign law on public policy grounds without contradicting the comitas principle: the limitation is built into the doctrine from the start.
Historical Dictionary Support
All three source dictionaries agree on the definition, the Latin equivalents, and the Kent citation, with only minor typographic variation. This uniformity reflects the settled, classical nature of the term — it was not a site of legal controversy by the time these dictionaries were compiled.
Burrill's entry is the most substantive, including both the limiting phrase (sine praejudicio) and a cross-reference to the fuller treatment under "Comity." Black's entries (both editions) are compressed, functioning primarily as a pointer to the Latin origin. Neither Black's edition adds doctrinal content beyond what Burrill provides.
What the historical dictionaries do not address is the theoretical debate that preceded this settled definition — particularly the tension between Huber's voluntarist account of comitas and later writers who argued that some degree of obligation underlies the doctrine. By the time these dictionaries were published, American courts had generally adopted the voluntarist position, and that debate is invisible in the entries.
Jurisdictional Note
Comitas as a concept applies wherever conflict-of-laws questions arise, but its weight varies. Federal courts and most state courts treat comity as discretionary, not obligatory. International usage, particularly in civil law jurisdictions, may assign it somewhat stronger normative force. The doctrine has distinct applications in constitutional law (interstate comity under the Full Faith and Credit Clause) and international law (recognition of foreign judgments), which are related but not identical to the classical comitas doctrine.
Encyclopedia Cross-Reference
See COMITY OF NATIONS