Rome throws out its kings
What happened
Rome's monarchy did not end in a single dramatic night. The historian Mary Beard describes the shift from kings to Republic as a change 'borne over a period of decades, if not centuries,' even though Roman tradition fixed one clean date, 510 BCE, for the expulsion of the last king, Tarquinius Superbus, Tarquin the Proud. In place of a single ruler, Rome installed two consuls, elected annually by the Comitia Centuriata, each holding equal power to command armies, preside over the Senate, and propose law, and each able to veto the other outright.
Why it matters
The mutual veto is the whole point: two men, each capable of freezing the other's decisions, made it structurally difficult for any single Roman to accumulate the kind of unchecked personal power a king had held. That same structural fear of one-man rule is exactly what Julius Caesar would break through roughly four and a half centuries later, and exactly what the Republic could never fully forgive him for.
How we know
Rome's own later constitutional practice, the paired consulship with mutual veto power, is well documented across the whole Republican period that followed, giving strong indirect evidence that some real transition away from one-man rule occurred. The specific narrative details of 510 BCE itself, though, rest on oral tradition recorded centuries later, which is why historians like Beard describe a gradual shift rather than a single overthrow.
Sources
- World History Encyclopedia. Roman Republic · Reputable sourceworldhistory.org · The domain "worldhistory.org" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
See something wrong? . Corrections with a source get fixed fastest.
Part of a timelineAncient Rome30 events · From a legendary fratricide on the Palatine Hill to a teenage emperor's quiet deposition twelve centuries later, told through the battles, plagues, and one bridge-crossing that ended a republic.View all →