Roman Republic, 450–390 BCE

Hybrid Regime · Republic · Mediterranean · Classical Antiquity era

The early Roman Republic of the Twelve Tables and the struggle of the orders, a small city-state expanding across Latium before the Gallic sack.

The early Roman Republic codified law in the Twelve Tables and worked through the long "struggle of the orders" between patricians and plebeians over office and debt. Annual magistrates and the Senate governed a small but expanding city-state that fought its Latin and Etruscan neighbors. A Gallic army sacked Rome around 390 BCE, a shock that preceded renewed expansion.

Open Roman Republic 450–390 BCE in the interactive 3D atlas →

Dominant patterns

  • External Expansion
  • Militarization
  • Democratization
  • Great-Power Rivalry

Political-science factor profile

Each factor 0–100; higher = stronger authoritarian / crisis pole (except institutional stability, where higher = stronger institutions).

Centralization of Power50
Media Control45
Repression45
Nationalism58
Militarization68
Economic Stress45
External Conflict68
Cult of Personality42
Elite Fragmentation55
Institutions55
Social Polarization62
Corruption & Patrimonialism42
Ideological Mobilization52
External Sovereignty82

Economy & society

GDP per capita$900 (intl-$)
Population400k people
Share of world population0.25%
Territory~6000 km²
Capital population~40k

Closest historical twins

The country-eras whose structural profile most resembles Roman Republic 450–390 BCE, by similarity score (0–100).

  1. France, 1946–1968 – similarity 94/100 · shared: External Expansion, Militarization, Democratization, Great-Power Rivalry
  2. France, 1900–1914 – similarity 92/100 · shared: External Expansion, Militarization, Democratization, Great-Power Rivalry
  3. Carthage, 450–350 BCE – similarity 88/100 · shared: External Expansion, Militarization, Democratization, Great-Power Rivalry
  4. Germany, 1890–1914 – similarity 88/100 · shared: External Expansion, Militarization, Democratization, Great-Power Rivalry
  5. United States, 1945–1968 – similarity 87/100 · shared: External Expansion, Militarization, Democratization, Great-Power Rivalry
  6. United States, 1981–1989 – similarity 86/100 · shared: External Expansion, Militarization, Democratization, Great-Power Rivalry
  7. France, 1870–1900 – similarity 85/100 · shared: External Expansion, Militarization, Democratization, Great-Power Rivalry
  8. United States, 1968–1980 – similarity 85/100 · shared: External Expansion, Militarization, Democratization, Great-Power Rivalry

What followed

  • Codified law and a widening citizen body.
  • The Gallic sack of Rome around 390 BCE.