Greco-Roman/Mediterranean Demographic Structure 100-300 CE

Demographic structure data (age structure, life expectancy, fertility, mortality) for Greco-Roman civilization during High Empire and crisis period (100-300 CE), showing balanced structure with declining life expectancy and increasing mortality during crisis.

Greco-Roman

Data Summary

• Age Structure (100 CE): ~34% under 15, ~61% 15-64, ~5% 65+ (balanced, moderate youth proportion)
• Age Structure (300 CE): ~32% under 15, ~63% 15-64, ~5% 65+ (balanced, declining youth proportion)
• Life Expectancy (100 CE): ~35-40 years at birth
• Life Expectancy (300 CE): ~30-35 years at birth (declining)
• Fertility Rate (100 CE): ~4-5 births per woman
• Fertility Rate (300 CE): ~4-5 births per woman (stable)
• Mortality Rate (100 CE): ~28-33 deaths per 1,000 population
• Mortality Rate (300 CE): ~35-40 deaths per 1,000 population (increasing)
• Trend: Declining demographic structure (declining life expectancy, increasing mortality during crisis)
• Confidence: Medium (limited historical records, archaeological evidence, expert assessments)
• Source: McEvedy & Jones 1978, expert assessments, archaeological skeletal analysis
• Period: 100-300 CE (High Empire through crisis of third century)

Time Series Data

Age Distribution

• Youth (0-14): 32-34% of population (moderate-high youth proportion, declining)
• Working Age (15-64): 61-63% of population (moderate-high, increasing)
• Elderly (65+): 5% of population (low, typical for pre-modern civilizations)

Age Structure Implications

• Military Capacity: Moderate-high youth proportion (32-34%) provides military recruitment pool (Guns axis), but declining
• Economic Capacity: Moderate-high working age (61-63%) supports economic productivity, but population declining
• Dependency Ratio: Moderate dependency (youth + elderly = 37-39%), manageable but population declining
• Population Decline: Stable fertility (4-5 births/woman) with increasing mortality (28-40 deaths/1,000) leads to population decline

Life Expectancy Trends

• 100 CE: 35-40 years at birth (moderate-high for pre-modern civilization)
• 300 CE: 30-35 years at birth (moderate, declining)
• Trend: Declining (disease ecology changes, crisis impacts, warfare)

Life Expectancy Implications

• Health Status: Declining life expectancy indicates worsening health conditions and disease burden
• Economic Capacity: Declining life expectancy reduces economic productivity per capita
• Disease Vulnerability: Declining life expectancy indicates increasing disease burden (Germs axis)

Fertility Trends

• 100 CE: 4-5 births per woman (moderate-high fertility)
• 300 CE: 4-5 births per woman (moderate-high fertility, stable)
• Trend: Stable moderate-high fertility (cultural preferences, agricultural economy)

Fertility Implications

• Population Growth: Moderate-high fertility enables population growth, but increasing mortality constrains growth
• Age Structure: Moderate-high fertility creates moderate-high youth proportion (32-34%)
• Economic Impact: Moderate-high fertility creates dependency but also future labor force

Mortality Trends

• 100 CE: 28-33 deaths per 1,000 population (moderate mortality, lower than most pre-modern civilizations)
• 300 CE: 35-40 deaths per 1,000 population (high mortality, increasing)
• Trend: Increasing (disease ecology changes, crisis impacts, warfare)

Mortality Implications

• Disease Burden: Increasing mortality indicates worsening disease burden (Germs axis)
• Infant Mortality: High infant mortality (estimated 200-300 per 1,000 live births) contributes to high overall mortality
• Life Expectancy: Increasing mortality reduces life expectancy (35-40 to 30-35 years)
• Population Decline: Increasing mortality leads to population decline despite stable fertility

Comparative Context

• Age Structure Comparison:
  • Similar to other pre-modern civilizations (high youth, low elderly)
  • Lower youth proportion than Sinitic (200 CE: 33% vs 38% under 15)
  • Declining structure indicates population decline
• Life Expectancy Comparison:
  • Higher than other pre-modern civilizations initially (35-40 years), then declining to similar levels (30-35 years)
  • Similar to Sinitic initially (200 CE: 33-38 vs 32-37 years), then declining
  • Declining life expectancy indicates crisis
• Fertility Comparison:
  • Lower than other pre-modern civilizations (4-5 vs 5-6 births/woman)
  • Lower than Sinitic (200 CE: 4-5 vs 5-6 births/woman)
  • Moderate-high fertility but insufficient to offset increasing mortality
• Mortality Comparison:
  • Lower than other pre-modern civilizations initially (28-33 vs 32-40 deaths/1,000), then increasing to similar levels (35-40 deaths/1,000)
  • Similar to Sinitic initially (200 CE: 30-35 vs 32-38 deaths/1,000), then increasing
  • Increasing mortality indicates crisis

Key Events

• 98-117 CE: Trajan's reign → trajan reign 98ce - Peak Roman Empire expansion, demographic structure balanced (32-34% under 15, 5% 65+), life expectancy 35-40 years

• 165-180 CE: Antonine Plague → antonine plague 165ce - Major plague, demographic crisis (mortality increase 28-35 → 35-40 deaths/1,000, life expectancy decline 35-40 → 30-35 years)

• 193-211 CE: Severan Dynasty → severan dynasty 193ce - Increased militarization, demographic decline continues

• 235-284 CE: Crisis of the Third Century → Crisis of the Third Century (250 CE) - Constant warfare, demographic crisis (mortality 35-40 deaths/1,000, life expectancy 30-35 years)

• 284-305 CE: Diocletian reforms → diocletian reforms 284ce - Administrative reforms, demographic recovery begins

• Event-data integration: Demographic crisis (increasing mortality 28-40 deaths/1,000, declining life expectancy 35-40 → 30-35 years) reflects Antonine Plague (165-180 CE) and Crisis of Third Century (235-284 CE), with disease ecology and warfare affecting demographic structure

• Demographic Structure: Balanced age structure with moderate-high youth proportion (32-34%) and low elderly (5%), but declining youth proportion indicates population decline

• Demographic Crisis: Increasing mortality (28-40 deaths/1,000) and declining life expectancy (35-40 to 30-35 years) indicate demographic crisis linked to disease ecology and warfare

• Regional Variation: Core regions (Italy, Gaul) may have different demographic structure than periphery (Britain, Dacia)

• Urban vs. Rural: Urban populations may have different demographic structure (lower fertility, higher mortality) than rural populations

• Disease Impact: Increasing mortality (35-40 deaths/1,000) indicates worsening disease burden; epidemics (Antonine Plague, Cyprian Plague) cause demographic disruptions

• Crisis of Third Century: Demographic decline (200-300 CE) linked to disease ecology, warfare, and economic crisis

• Data needs: More detailed age structure data (5-year age groups), infant mortality rates, cause-specific mortality, regional demographic variation