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Data card

Mesoamerican Demographic Structure 500-1500 CE

Demographic structure data (age structure, life expectancy, fertility, mortality) for Mesoamerican civilization during Classic and Post-Classic periods (500-1500 CE), showing demographic growth, peak, decline, and recovery.

Mesoamerican

Data Summary

  • Age Structure (500 CE): ~38% under 15, ~57% 15-64, ~5% 65+ (balanced, high youth proportion)
  • Age Structure (900 CE): ~39% under 15, ~56% 15-64, ~5% 65+ (balanced, peak youth proportion)
  • Age Structure (1200 CE): ~35% under 15, ~60% 15-64, ~5% 65+ (balanced, declining youth proportion)
  • Age Structure (1500 CE): ~38% under 15, ~57% 15-64, ~5% 65+ (balanced, recovery)
  • Life Expectancy (500 CE): ~30-35 years at birth
  • Life Expectancy (900 CE): ~32-37 years at birth (peak)
  • Life Expectancy (1200 CE): ~28-33 years at birth (declining)
  • Life Expectancy (1500 CE): ~30-35 years at birth (recovery)
  • Fertility Rate (500-1500 CE): ~5-6 births per woman (stable)
  • Mortality Rate (500 CE): ~34-39 deaths per 1,000 population
  • Mortality Rate (900 CE): ~32-37 deaths per 1,000 population (peak)
  • Mortality Rate (1200 CE): ~38-43 deaths per 1,000 population (increasing, crisis)
  • Mortality Rate (1500 CE): ~34-39 deaths per 1,000 population (recovery)
  • Trend: Growth to peak (500-900), decline (900-1200), recovery (1200-1500)
  • Confidence: Weak (very limited historical records, primarily archaeological estimates)
  • Source: McEvedy & Jones 1978, expert assessments, archaeological skeletal analysis
  • Period: 500-1500 CE (Classic period through Post-Classic, pre-contact)

Time Series Data

Year Age <15 (%) Age 15-64 (%) Age 65+ (%) Life Expectancy (years) Fertility (births/woman) Mortality (deaths/1,000) Notes
500 38 57 5 30-35 5-6 34-39 Classic period, growth begins
700 39 56 5 31-36 5-6 33-38 Classic period, continued growth
900 39 56 5 32-37 5-6 32-37 Classic peak, maximum population
1100 36 59 5 29-34 5-6 36-41 Post-Classic, decline begins
1200 35 60 5 28-33 5-6 38-43 Post-Classic, crisis period
1300 36 59 5 29-34 5-6 36-41 Post-Classic, recovery begins
1500 38 57 5 30-35 5-6 34-39 Post-Classic, recovery, pre-contact peak

Age Distribution

  • Youth (0-14): 35-39% of population (high youth proportion, balanced structure, varies with population growth/decline)
  • Working Age (15-64): 56-60% of population (moderate-high, supports economic capacity, varies with population growth/decline)
  • Elderly (65+): 5% of population (low, typical for pre-modern civilizations)

Age Structure Implications

  • Military Capacity: High youth proportion (35-39%) provides military recruitment pool (Guns axis), varies with population growth/decline
  • Economic Capacity: Moderate-high working age (56-60%) supports economic productivity, varies with population growth/decline
  • Dependency Ratio: Moderate dependency (youth + elderly = 40-44%), manageable
  • Population Dynamics: High fertility (5-6 births/woman) with varying mortality (32-43 deaths/1,000) leads to population growth, decline, and recovery

Life Expectancy Trends

  • 500 CE: 30-35 years at birth (moderate for pre-modern civilization)
  • 900 CE: 32-37 years at birth (moderate, peak)
  • 1200 CE: 28-33 years at birth (low-moderate, declining, crisis)
  • 1500 CE: 30-35 years at birth (moderate, recovery)
  • Trend: Growth to peak (500-900), decline (900-1200), recovery (1200-1500)

Life Expectancy Implications

  • Health Status: Moderate life expectancy indicates moderate disease burden, declining during crisis
  • Economic Capacity: Moderate life expectancy enables economic productivity, declining during crisis
  • Disease Vulnerability: Moderate life expectancy indicates moderate disease burden (Germs axis), worsening during crisis

Fertility Trends

  • 500-1500 CE: 5-6 births per woman (high fertility, stable)
  • Trend: Stable high fertility (cultural preferences, agricultural economy, high infant mortality)

Fertility Implications

  • Population Growth: High fertility enables population growth, but increasing mortality constrains growth during crisis
  • Age Structure: High fertility creates high youth proportion (35-39%)
  • Economic Impact: High fertility creates dependency but also future labor force

Mortality Trends

  • 500 CE: 34-39 deaths per 1,000 population (high mortality)
  • 900 CE: 32-37 deaths per 1,000 population (moderate-high mortality, peak)
  • 1200 CE: 38-43 deaths per 1,000 population (very high mortality, crisis)
  • 1500 CE: 34-39 deaths per 1,000 population (high mortality, recovery)
  • Trend: Decline to peak (500-900), increase (900-1200, crisis), recovery (1200-1500)

Mortality Implications

  • Disease Burden: High to very high mortality indicates significant disease burden (Germs axis), worsening during crisis
  • Infant Mortality: High infant mortality (estimated 200-300 per 1,000 live births) contributes to high overall mortality
  • Life Expectancy: High to very high mortality limits life expectancy (28-37 years)
  • Population Dynamics: High mortality constrains population growth; very high mortality during crisis leads to population decline

Comparative Context

  • Age Structure Comparison:
    • Similar to other pre-modern civilizations (high youth, low elderly)
    • Similar to Sinitic (1500 CE: 38% vs 38% under 15)
    • Balanced structure supports economic and military capacity
  • Life Expectancy Comparison:
    • Similar to other pre-modern civilizations (30-35 years, peak 32-37 years)
    • Similar to Sinitic (1500 CE: 30-35 vs 32-37 years)
    • Moderate for pre-modern standards, declining during crisis
  • Fertility Comparison:
    • Similar to other pre-modern civilizations (5-6 births/woman)
    • Similar to Sinitic (1500 CE: 5-6 vs 5-6 births/woman)
    • High fertility enables population growth
  • Mortality Comparison:
    • Similar to other pre-modern civilizations (34-39 deaths/1,000, peak 32-37, crisis 38-43)
    • Similar to Sinitic (1500 CE: 34-39 vs 32-38 deaths/1,000)
    • High mortality, very high during crisis

Key Events

  • 500-900 CE: Classic period expansion - Demographic structure balanced (35-37% under 15, 5% 65+), life expectancy 28-32 years, fertility 5-6 births/woman
  • 900 CE: Classic period peak - Demographic structure balanced (35-37% under 15, 5% 65+), life expectancy 28-32 years
  • 900-1200 CE: Classic collapse period - Demographic crisis (very high mortality 38-43 deaths/1,000, declining life expectancy 28-33 → 25-28 years), demographic disruption
  • 1200-1500 CE: Post-Classic recovery period - Demographic recovery (life expectancy recovery 25-28 → 28-30 years), demographic structure balanced (35-37% under 15, 5% 65+), Aztec expansion
  • Event-data integration: Demographic crisis (very high mortality 38-43 deaths/1,000, declining life expectancy 28-33 → 25-28 years) linked to Classic collapse (900-1200 CE), with demographic recovery (1200-1500 CE) reflecting Post-Classic recovery

Population Under 15† (percent, )

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (7 points)
YearValueSource
500~38UNATTRIBUTED in public archive
700~39UNATTRIBUTED in public archive
900~39UNATTRIBUTED in public archive
1100~36UNATTRIBUTED in public archive
1200~35UNATTRIBUTED in public archive
1300~36UNATTRIBUTED in public archive
1500~38UNATTRIBUTED in public archive

Population 15-64† (percent, )

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (7 points)
YearValueSource
500~57UNATTRIBUTED in public archive
700~56UNATTRIBUTED in public archive
900~56UNATTRIBUTED in public archive
1100~59UNATTRIBUTED in public archive
1200~60UNATTRIBUTED in public archive
1300~59UNATTRIBUTED in public archive
1500~57UNATTRIBUTED in public archive

Population Over 65† (percent, )

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (7 points)
YearValueSource
500~5UNATTRIBUTED in public archive
700~5UNATTRIBUTED in public archive
900~5UNATTRIBUTED in public archive
1100~5UNATTRIBUTED in public archive
1200~5UNATTRIBUTED in public archive
1300~5UNATTRIBUTED in public archive
1500~5UNATTRIBUTED in public archive

Life Expectancy† (years, )

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (7 points)
YearValueSource
500~32.5UNATTRIBUTED in public archive
700~33.5UNATTRIBUTED in public archive
900~34.5UNATTRIBUTED in public archive
1100~31.5UNATTRIBUTED in public archive
1200~30.5UNATTRIBUTED in public archive
1300~31.5UNATTRIBUTED in public archive
1500~32.5UNATTRIBUTED in public archive

Fertility Rate† (births_per_woman, )

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (7 points)
YearValueSource
500~5.5UNATTRIBUTED in public archive
700~5.5UNATTRIBUTED in public archive
900~5.5UNATTRIBUTED in public archive
1100~5.5UNATTRIBUTED in public archive
1200~5.5UNATTRIBUTED in public archive
1300~5.5UNATTRIBUTED in public archive
1500~5.5UNATTRIBUTED in public archive

Mortality Rate† (per_1000, )

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (7 points)
YearValueSource
500~36.5UNATTRIBUTED in public archive
700~35.5UNATTRIBUTED in public archive
900~34.5UNATTRIBUTED in public archive
1100~38.5UNATTRIBUTED in public archive
1200~40.5UNATTRIBUTED in public archive
1300~38.5UNATTRIBUTED in public archive
1500~36.5UNATTRIBUTED in public archive
About this entry

A draft entry preserved from civilization.study. Evidence grade: weak. 2 of 2 listed sources are fully documented; the rest are names only. † marks figures that are scholarly estimates. Method and sources

Methodology Notes

  • Estimation method:
    • Archaeological skeletal analysis provides age structure and mortality evidence
    • Demographic models (stable population models, life tables) estimate life expectancy and fertility
    • Expert assessments (scholarly consensus) for periods with very limited data
    • Cross-validation using population growth rates and age structure models
  • Data quality: Weak (very limited historical records, primarily archaeological estimates)
  • Uncertainty range:
    • Age structure: ±8-12% (very limited historical records, regional variation)
    • Life expectancy: ±4-6 years (archaeological evidence, demographic models)
    • Fertility: ±0.8-1.2 births/woman (demographic models, expert assessments)
    • Mortality: ±4-6 deaths/1,000 (archaeological evidence, demographic models)
  • Limitations:
    • Very limited historical records
    • Archaeological skeletal analysis limited to burial sites, may not represent full population
    • Regional variation within Mesoamerican civilization not fully captured
    • Urban vs. rural demographic differences uncertain
    • Infant mortality data very limited
  • Cross-validation:
    • Population growth rates (fertility - mortality = growth, negative growth 900-1200 CE)
    • Age structure models (stable population models)
    • Archaeological evidence (skeletal analysis, burial patterns)

Integration with Corpus

  • Links to claims: Mesoamerican Civilization (supports GGS assessment, demographic capacity, Classic collapse analysis)
  • Supports patterns:
  • GGS implications:
    • Germs axis: High to very high mortality (32-43 deaths/1,000) indicates significant disease burden, worsening during crisis; moderate population density increases disease vulnerability; age structure affects disease impact; Classic collapse linked to disease ecology
    • Style axis: Balanced age structure (56-60% working age) supports economic capacity, but population declining during crisis; declining life expectancy reduces economic productivity during crisis
    • Guns axis: High youth proportion (35-39%) provides military recruitment pool, but declining during crisis; declining life expectancy limits veteran experience during crisis
    • Economic capacity: Moderate-high working age (56-60%) supports economic productivity, but population declining during crisis; crisis impacts economic capacity
    • Crisis: Very high mortality (38-43 deaths/1,000) and declining life expectancy (28-33 years) during 900-1200 CE indicate demographic crisis linked to Classic collapse
  • Framework integration:

Notes

  • Demographic Structure: Balanced age structure with high youth proportion (35-39%) and low elderly (5%), varies with population growth/decline
  • Demographic Crisis: Very high mortality (38-43 deaths/1,000) and declining life expectancy (28-33 years) during 900-1200 CE indicate demographic crisis linked to Classic collapse
  • Demographic Recovery: Recovery (1200-1500 CE) shows population growth and improving demographic structure
  • Regional Variation: Core regions (Maya lowlands, central Mexico) may have different demographic structure than periphery
  • Urban vs. Rural: Urban populations may have different demographic structure (higher mortality in cities) than rural populations
  • Disease Impact: Very high mortality (38-43 deaths/1,000) during crisis indicates worsening disease burden; epidemics may cause demographic disruptions
  • Classic Collapse: Demographic decline (900-1200 CE) linked to disease ecology, warfare, and environmental degradation
  • Data needs: More detailed age structure data (5-year age groups), infant mortality rates, cause-specific mortality, regional demographic variation

Art: Patterns of Civilization chronicle art, made with AI: illustrations, not historical evidence. Entries are drafts preserved from civilization.study. Method and sources.