Definition
Circuity of action is the condition that arises when a litigant pursues a roundabout or indirect course of litigation — bringing two or more separate actions to achieve a result that could have been accomplished in a single, more direct proceeding. The law disfavors circuity of action because it multiplies suits, burdens courts, and forces parties into unnecessary successive proceedings when one consolidated action would fully resolve the dispute.
The concept operates both as a description of a procedural problem and as a justification for equitable intervention. When a court recognizes that a straightforward proceeding is available, it may require that course instead of permitting fragmented litigation to proceed piecemeal.
Common Confusion
Circuity of action is sometimes conflated with splitting a cause of action, but the concepts are distinct. Splitting a cause of action is the improper division of a single claim into multiple suits, which res judicata doctrine then bars. Circuity of action is broader: it describes any procedurally indirect route — including the use of successive actions — that needlessly multiplies litigation even where no single claim has technically been divided. A circuitous course of litigation may or may not involve claim-splitting; the vice addressed is inefficiency and indirection, not necessarily the fragmentation of one claim.
Why It Matters in Research
Researchers encounter circuity of action most often in two contexts: (1) historical equity jurisprudence, where courts of equity justified taking jurisdiction precisely to prevent circuitous litigation that would otherwise have required a party to pursue multiple proceedings at common law; and (2) modern procedural reform scholarship, where the term appears as historical background explaining why compulsory joinder rules, interpleader, counterclaim requirements, and consolidation doctrines developed.
The key research trap is that the term nearly disappears from modern primary sources. Post-merger of law and equity under the Federal Rules of Civil Procedure (1938) and equivalent state reforms, the procedural tools designed to prevent circuity — permissive and compulsory joinder, cross-claims, third-party practice — became standard procedural machinery. Courts rarely need to invoke circuity of action by name because the rules now structurally eliminate most of the conditions that created it. Researchers reading modern opinions will not find the term; researchers reading pre-merger equity decisions and common law pleading materials will find it frequently.
When researching historical equity jurisdiction, note that circuity of action was one of the recognized grounds on which equity asserted concurrent jurisdiction alongside courts of law. A party who could show that obtaining full relief at law would require two or more successive suits could invoke equity to achieve complete resolution in one proceeding. This argument appears repeatedly in chancery practice materials and in treatises on equity jurisdiction through the nineteenth century.
For corpus research, look for the term clustering with discussions of: multiplicity of suits, complete relief, joinder of parties, interpleader, and the maxim that equity acts to avoid a multiplicity of actions.
Historical Dictionary Support
The three shelf sources agree on the core meaning but approach it from different angles, each adding something useful.
Black's focuses on the structural description: the litigant takes a complex, indirect, roundabout course that makes two or more actions necessary where a direct course would have accomplished the same result in one suit. This is the clearest operational definition for a researcher trying to identify the doctrine in historical opinions.
Bouvier's adds the normative dimension most directly, calling circuity of action "particularly obnoxious to the law, as tending to multiply suits." The citation to 4 Cow. 682 (an early New York reports reference) anchors the doctrine in American common law practice. Bouvier's framing — "indirectly obtaining, by means of a subsequent action, a result which may be reached in an action already pending" — helpfully specifies that the problem often arises not just in planning litigation but in the relationship between a pending action and a proposed follow-on suit.
Burrill's is the most textured source and the hardest to parse, reflecting the fragmented state of its surviving text. The reference to Bentham's Judicial Evidence and the note that "the force of the term appears in its plural form" gestures toward a broader jurisprudential critique of procedural indirection. Burrill's cross-reference to Termes de la Ley and Cowell confirms the term's deep roots in common law pleading vocabulary, predating equity's systematic use of it as a jurisdictional hook.
What the historical dictionaries collectively miss: none addresses the term's functional obsolescence after procedural merger, nor do they connect it explicitly to the doctrinal descendants — compulsory counterclaim rules, required joinder of parties, and interpleader — that absorbed its work.
Jurisdictional Note
The doctrine was recognized in both English and American courts, but its practical expression varied by whether a jurisdiction maintained separate courts of law and equity. In jurisdictions that merged law and equity earlier (or never fully separated them), circuity of action as an independent doctrine had less occasion to develop. Its greatest doctrinal elaboration occurred in jurisdictions with robust chancery practice.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Equity Jurisdiction; Multiplicity of Suits; Joinder of Parties