Rome's political system evolved over roughly twelve centuries, moving from a kingdom the World History Encyclopedia dates to 750–510 BCE, through a republic from 510 to 27 BCE, to an empire that governed the Mediterranean world and much of western Europe, according to the World History Encyclopedia. The institutions Romans built to run that state, and the strict social order they lived under, left marks on law, language and politics that are still visible today.
From kings to consuls: how Rome governed itself
During the Kingdom period (750–510 BCE), Rome was ruled by seven kings advised by a Senate of about 100 members, the World History Encyclopedia states. After the monarchy was overthrown, the Republic split power between three bodies: elected magistrates, the Senate, and popular assemblies.
Two consuls, elected annually, acted as the Republic's chief executives. They commanded armies and presided over the Senate, but each could veto the other's decisions, according to the World History Encyclopedia. Consulships and other offices were initially reserved for patricians, the hereditary upper class; plebeians became eligible for the consulship in 367 BCE, and by 342 BCE one of the two consuls had to be a plebeian.
The Senate itself had no formal power to pass laws. Instead, it controlled foreign policy, state finances and religious matters, and its membership — drawn from former magistrates — grew substantially over time. Laws were enacted by popular assemblies, including the wealth-based Comitia Centuriata and the Concilium Plebis, a plebeian assembly established in 494 BCE whose elected tribunes could veto decisions affecting ordinary citizens.
Size of the Roman Senate over time| Period | Approximate senators |
|---|
| Kingdom (750–510 BCE) | 100 |
|---|
| 2nd century BCE | 300 |
|---|
| Era of Sulla (early 1st century BCE) | 900 |
|---|
| Under Julius Caesar (mid-1st century BCE) | 1,000 |
|---|
| Under Augustus (from 27 BCE) | 600 |
|---|
The figures above, reported by the World History Encyclopedia, show how the Senate's size shifted with political upheaval before Augustus set it at roughly 600 once the Empire began. With Augustus's consolidation of power in 27 BCE, popular assemblies largely stopped functioning and the Senate became a mostly ceremonial body that ratified decisions made by the emperor.
A rigidly stratified society
Roman society was organized into five broad classes by the end of what historians call the Conflict of the Orders, a struggle for political rights lasting roughly from 500 to 287 BCE, according to the World History Encyclopedia's article on Roman society: patricians, equites (an equestrian business and landowning class), plebeians, freedmen, and slaves.
- Patricians: a hereditary aristocracy that initially monopolized the Senate and magistracies.
- Equites: originally mounted cavalry, later a commercial and banking class; a 218 BCE-era law barred senators themselves from trade.
- Plebeians: the majority of citizens, including farmers, artisans and professionals, who gained the right to intermarry with patricians in 445 BCE and legal protections through the Twelve Tables of 449 BCE.
- Freedmen: former slaves who gained citizenship but were barred from holding political office; their children had full citizen rights.
- Slaves: people with no legal rights, obtained through war, the slave trade or debt; some wealthy households held as many as 1,000.
Women stood outside this male hierarchy. According to the World History Encyclopedia, Roman women remained legally subject to their fathers even after marriage, were denied political office, and lost custody of children by default in a divorce — though they could initiate divorce and manage property independently.
Lasting influence on Western civilization
Rome's clearest institutional legacy is legal. Byzantine emperor Justinian I ordered the compilation of the Corpus Juris Civilis, issued between 529 and 534 CE, bringing together imperial laws, jurists' writings and a legal textbook into a single code, according to a Lumen Learning history course. That text later became the foundation of law in continental Europe's civil law jurisdictions, and it also influenced the Catholic Church's canon law, the course states.
Rome's second major legacy is linguistic. The everyday Latin spoken by soldiers, merchants and settlers evolved, after the empire's fragmentation, into the Romance languages between roughly the 6th and 9th centuries, according to WorldAtlas. WorldAtlas counts 23 Romance languages today, with the five largest — Spanish, Portuguese, French, Italian and Romanian — having a combined 955 million native speakers by its estimate.
Political vocabulary and mechanisms from the Republic also persisted: the mutual veto between consuls, the division of power among distinct bodies, and representation through elected tribunes are often cited as precursors to checks-and-balances systems adopted by later republics. Rome itself, however, was never a democracy in the modern sense — voting power in its assemblies was weighted toward wealthier citizens, and full political rights never extended to women or slaves.
This piece was prepared with artificial intelligence and passed an automated source check before publication. If you see an error, ask for a correction. Request a correction or reply · How we make this
