The Second Punic War is invoked in Federalist No. 63 as evidence that a senate can lose its original political power to a popular branch. The essay cites Carthage at the war’s outset: according to Polybius, its Senate had already lost almost the whole of its original portion of authority. The reference serves a constitutional argument, not a narrative of the war itself.

The Historical Reference

The war enters the discussion in a compact sequence of ancient examples. The essay first recalls the Ephori in Sparta, who gained authority over the life-tenured senate, and the Tribunes of Rome, whose contests with the Senate also ended in popular representatives’ ascendancy. It then turns to Carthage, where Polybius’s account supplies a parallel: at the commencement of the Second Punic War, the Senate had lost almost all of its original share of power.

The evidence establishes the timing and political condition attached to the reference, but does not describe the war’s battles, participants, or outcome. Its focus is the Carthaginian Senate’s diminished authority, not the military history of the conflict.

Constitutional Use

The example belongs to an argument against the prospect that the proposed federal Senate could gradually make itself an independent aristocratic body through usurpation. The essay assembles historical precedents in which popular representatives prevailed over senates, using them to support the claim that a legislature’s popular branch can exert formidable political force.

Carthage adds a distinct instance to the Spartan and Roman comparisons: senatorial authority was not merely challenged, but had, by the start of the war, been reduced to a small fraction of its original extent. The essay uses this as evidence for its prediction about the federal Senate and House of Representatives. It further argues that, should the Senate ever undergo such a transformation, the House, backed by the people, could restore the Constitution to its original principles. The war’s name thus marks the date of a constitutional example, while the example’s significance lies in the changing balance of power within Carthage.