Whether the Seventh Amendment requires a 12-member jury in a federal civil case.
Holding
No. A six-member jury satisfies the Seventh Amendment's guarantee of trial by jury in civil cases.
Reasoning
The Seventh Amendment preserves the right to jury trial in "Suits at common law." The Court read that phrase chiefly as identifying the class of civil cases in which the jury right applies, rather than freezing every procedural feature of the common-law jury as it existed in 1791.
The historical controversy surrounding adoption of the Seventh Amendment focused on preventing abolition of civil juries. The Framers faced substantial variation among the States concerning when juries were used, and the available history did not show an intent to constitutionalize every traditional incident of jury practice, including a fixed number of jurors.
The Court's prior cases distinguish the substance of the jury-trial right from procedural form. The Amendment does not bind federal courts to every detail of eighteenth-century practice; courts may use new procedures that preserve the jury's essential role as factfinder and adapt the institution to modern needs.
A jury of 12 was not shown to be an indispensable substantive feature of civil jury trial. The Court relied on Williams v. Florida, which had concluded that jury reliability is not a function of having exactly 12 members, and noted that empirical work on civil juries did not establish a discernible difference in results between six- and 12-member juries.
Earlier statements that a jury necessarily consisted of 12 persons, particularly in Capital Traction Co. v. Hof, were dicta because jury size was not the issue litigated or decided in those cases. The Court declined to treat those unsupported statements as controlling precedent.
The Court did not decide whether a civil jury smaller than six would satisfy the Seventh Amendment. It held only that six jurors are numerous enough to support group deliberation and a representative cross section of the community.