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Data card

Andean Civilization Fiscal Data 500-1500 CE

Fiscal capacity estimates for Andean civilization during pre-Columbian period (500-1500 CE), showing labor-based fiscal systems, tax revenue, and fiscal-military relationship.

Andean

Data Summary

  • Tax revenue (500 CE): ~$0.10 billion (1990 international $, ~8% of GDP, estimated)
  • Tax revenue (1000 CE): ~$0.28 billion (1990 international $, ~8% of GDP, estimated)
  • Tax revenue (1500 CE): ~$0.38 billion (1990 international $, ~8% of GDP, estimated)
  • Tax-to-GDP ratio (500-1500 CE): ~8% (stable, estimated)
  • Military expenditure (500 CE): ~$0.05 billion (1990 international $, ~50% of tax revenue, estimated)
  • Military expenditure (1000 CE): ~$0.14 billion (1990 international $, ~50% of tax revenue, estimated)
  • Military expenditure (1500 CE): ~$0.19 billion (1990 international $, ~50% of tax revenue, estimated)
  • Military spending as % of GDP (500 CE): ~4.0%
  • Military spending as % of GDP (1000 CE): ~4.0%
  • Military spending as % of GDP (1500 CE): ~4.0%
  • Trend: Increasing (moderate growth, fiscal capacity increases, military expenses stable as % of tax revenue)
  • Confidence: Weak (very limited fiscal records, high uncertainty, estimates based on typical ratios)
  • Source: Historical fiscal records (where available), comparative estimates, Maddison Project GDP estimates
  • Period: 500-1500 CE (Wari, Tiwanaku, Inca phases)

Time Series Data

Year Tax Revenue (billions, 1990 $) Tax-to-GDP Ratio Military Expenditure (billions, 1990 $) Military % of Tax Revenue Military % of GDP Source Notes
500 0.10 8% 0.05 50% 4.0% Estimates Wari/Tiwanaku expansion
800 0.22 8% 0.11 50% 4.0% Estimates Wari/Tiwanaku peak
1000 0.28 8% 0.14 50% 4.0% Estimates Regional kingdoms
1200 0.32 8% 0.16 50% 4.0% Estimates Inca expansion begins
1500 0.38 8% 0.19 50% 4.0% Estimates Inca peak, pre-contact

Fiscal-Military Relationship Analysis

  • Fiscal capacity enables military capacity: Increasing tax revenue (0.10B → 0.38B) enables military expansion (50K-100K → 150K-200K warriors)
  • Military expenditure strains fiscal systems: Military spending stable at ~50% of tax revenue, creating moderate fiscal pressure
  • Fiscal-military cycles: Expansion cycles (Wari/Tiwanaku, Inca) → Fiscal capacity enables military expansion
  • Fiscal sustainability: Fiscal capacity enables military sustainability despite moderate fiscal pressure

Comparative Context

  • Regional average (Americas, 1000 CE): ~8% tax-to-GDP ratio
  • Global average (1000 CE): ~6-10% tax-to-GDP ratio
  • Ranking: Moderate fiscal capacity globally (500-1500 CE, 4th-5th largest economy)
  • Tax-to-GDP ratio: Moderate (8%) for pre-modern period
  • Military spending as % of GDP: Moderate (4%) for pre-modern period
  • Comparison to other civilizations (1000 CE):
    • Mesoamerican: ~Similar tax-to-GDP ratio (Mesoamerican ~8%)
    • West African/Sahelian: ~Similar tax-to-GDP ratio (West African/Sahelian ~8%)

Fiscal System Characteristics

  • Labor-based taxation: Primary revenue source (mit'a labor service, corvée labor)
  • Agricultural taxation: Important revenue source (land taxes, grain taxes)
  • Vertical archipelago coordination: Fiscal systems coordinated across vertical archipelagos
  • Monetary taxation: Limited (primarily in-kind taxation)
  • Labor-based systems: Fiscal systems based on labor service (mit'a) rather than monetary taxation

Key Events

  • 500-1000 CE: Middle Horizon period - Fiscal capacity growth (tax revenue $0.24B → $0.48B), labor-based systems
  • 1000-1200 CE: Regional states period - Continued fiscal capacity growth (tax revenue $0.48B → $0.64B), state coordination
  • 1200-1500 CE: Inca expansion period - Continued fiscal capacity growth (tax revenue $0.64B → $0.96B), state coordination, labor service systems
  • Event-data integration: Fiscal capacity growth (tax revenue $0.24B → $0.96B) linked to Middle Horizon (500-1000 CE), regional states (1000-1200 CE), and Inca expansion (1200-1500 CE), with labor-based systems enabling fiscal capacity

Tax Revenue† (billions_1990_intl_dollars, 500-1500)

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (5 points)
YearValueSource
500~0.1Estimates
800~0.22Estimates
1000~0.28Estimates
1200~0.32Estimates
1500~0.38Estimates

Tax-to-GDP Ratio† (percent, 500-1500)

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (5 points)
YearValueSource
500~8Estimates
800~8Estimates
1000~8Estimates
1200~8Estimates
1500~8Estimates

Military Expenditure† (billions_1990_intl_dollars, 500-1500)

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (5 points)
YearValueSource
500~0.05Estimates
800~0.11Estimates
1000~0.14Estimates
1200~0.16Estimates
1500~0.19Estimates

Military % of Tax Revenue† (percent, 500-1500)

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (5 points)
YearValueSource
500~50Estimates
800~50Estimates
1000~50Estimates
1200~50Estimates
1500~50Estimates

Military % of GDP† (percent, 500-1500)

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (5 points)
YearValueSource
500~4Estimates
800~4Estimates
1000~4Estimates
1200~4Estimates
1500~4Estimates
About this entry

A draft entry preserved from civilization.study. Evidence grade: weak. 1 of 1 listed sources are fully documented; the rest are names only. † marks figures that are scholarly estimates. Method and sources

Methodology Notes

  • Estimation method: Historical fiscal records (where available), comparative estimates using GDP and typical tax ratios, archaeological proxies
  • Data quality: Weak (very limited fiscal records, high uncertainty, estimates based on typical ratios)
  • Uncertainty range: Tax revenue ±30%, tax-to-GDP ratio ±3%, military expenditure ±35%
  • Limitations: Very limited fiscal records, high uncertainty, estimates based on typical ratios, archaeological proxies
  • Cross-validation: Validated against Maddison Project GDP estimates, military size data (where available)

Integration with Corpus

Notes

  • Fiscal capacity enables military expansion (50K-100K → 150K-200K warriors) but military expenses create moderate fiscal pressure
  • Tax-to-GDP ratio stable at ~8%, demonstrating consistent fiscal systems
  • Military spending stable at ~50% of tax revenue, creating moderate fiscal pressure but enabled by fiscal capacity
  • Labor-based fiscal systems demonstrate distinctive fiscal-military relationship (labor service enables military capacity)
  • Links to Fiscal-Military State Dynamics for complete fiscal-military analysis

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