Roman Republic, 80–44 BCE

Hybrid Regime · Republic · Mediterranean · Age of Rome era

Crisis of the late Republic: civil wars, personalization of power, and the breakdown of institutions.

Sulla’s dictatorship set precedents of armies marching on Rome and the proscription of opponents. Extended commands against Mithridates, the pirates and in Gaul attached soldiers’ loyalty to generals rather than institutions. The First Triumvirate bypassed the Senate; its collapse brought civil war and Caesar’s dictatorship. The assassination of 44 BCE failed to restore the republic and opened a further round of civil wars.

Open Roman Republic 80–44 BCE in the interactive 3D atlas →

Dominant patterns

  • Militarization
  • Revolutionary Risk
  • External Expansion
  • Institutional Decay
  • Imperial Decline

Political-science factor profile

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

Centralization of Power54
Media Control30
Repression60
Nationalism50
Militarization88
Economic Stress62
External Conflict80
Cult of Personality72
Elite Fragmentation92
Institutions28
Social Polarization88
Corruption & Patrimonialism75
Ideological Mobilization30
External Sovereignty100

Economy & society

GDP per capita$1100 (intl-$)
Population55.0M people
Share of world population29%
Territory~1.9M km²
Capital population~600k

Closest historical twins

The country-eras whose structural profile most resembles Roman Republic 80–44 BCE, by similarity score (0–100).

  1. Russian Empire, 1725–1762 – similarity 84/100 · shared: Militarization, External Expansion, Institutional Decay, Imperial Decline
  2. Gran Colombia, 1819–1831 – similarity 83/100 · shared: Militarization, Revolutionary Risk, External Expansion, Institutional Decay, Imperial Decline
  3. Mexico, 1821–1848 – similarity 83/100 · shared: Militarization, Revolutionary Risk, External Expansion, Institutional Decay, Imperial Decline
  4. Ottoman Empire, 1808–1839 – similarity 81/100 · shared: Militarization, External Expansion, Institutional Decay, Imperial Decline
  5. Byzantium, 1025–1071 – similarity 80/100 · shared: Militarization, External Expansion, Institutional Decay, Imperial Decline
  6. Ottoman Empire, 1789–1808 – similarity 78/100 · shared: Militarization, External Expansion, Institutional Decay, Imperial Decline
  7. Qajar Persia, 1789–1834 – similarity 77/100 · shared: Militarization, External Expansion, Institutional Decay, Imperial Decline
  8. Ottoman Empire, 1730–1774 CE – similarity 76/100 · shared: Militarization, External Expansion, Institutional Decay, Imperial Decline

What followed

  • Transition from republic to empire.
  • A series of civil wars.