The historical background to democracy, which good citizens must defend, started with the Greeks. Thucydides, Plato, Aristotle, and Polybius thought that political history was circular, which meant that good regimes, ruling on behalf of the people, held sway for a time but deteriorated into bad regimes – tyrannical – ruling for the rulers’ benefit. Their solution was to propose “mixed regimes,” containing monarchical, aristocratic, and democratic elements which, checked and balanced, would have to cooperate with each other by compromising different interests. Such a regime was the Roman Republic, which promoted both compromise and public virtue (“republicanism”) in the sense of devotion toward the state. During the Enlightenment, European political thinkers added the concepts of “sovereignty,” in order to impose public order, and “social contracts,” to make sovereigns at least somewhat answerable to subjects. Thus when the Founders convened to invent their government, they used “common sense,” prescribed by Paine, Jefferson, Madison, and others, to fashion a mixed government of special character. That government, which the Founders called “republican,” rested on a written “constitution,” which reined in “factions” via “checks and balances,” and which refrained from creating a “sovereign” who might, as in the French case almost immediately, plunge the nation into war.