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Data card

West African/Sahelian Civilization Fiscal Data 800-1500 CE

Fiscal capacity estimates for West African/Sahelian civilization during medieval period (800-1500 CE), showing trade-based fiscal systems, tax revenue, and fiscal-military relationship.

West African / Sahelian

Data Summary

  • Tax revenue (800 CE): ~$0.19 billion (1990 international $, ~8% of GDP, estimated)
  • Tax revenue (1200 CE): ~$0.38 billion (1990 international $, ~8% of GDP, estimated)
  • Tax revenue (1500 CE): ~$0.48 billion (1990 international $, ~8% of GDP, estimated)
  • Tax-to-GDP ratio (800-1500 CE): ~8% (stable, estimated)
  • Military expenditure (800 CE): ~$0.09 billion (1990 international $, ~47% of tax revenue, estimated)
  • Military expenditure (1200 CE): ~$0.18 billion (1990 international $, ~47% of tax revenue, estimated)
  • Military expenditure (1500 CE): ~$0.23 billion (1990 international $, ~48% of tax revenue, estimated)
  • Military spending as % of GDP (800 CE): ~3.8%
  • Military spending as % of GDP (1200 CE): ~3.8%
  • Military spending as % of GDP (1500 CE): ~3.8%
  • 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: 800-1500 CE (Ghana, Mali, Songhai 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
800 0.19 8% 0.09 47% 3.8% Estimates Ghana expansion, trans-Saharan trade
1000 0.29 8% 0.14 48% 3.9% Estimates Ghana peak, trade growth
1200 0.38 8% 0.18 47% 3.8% Estimates Mali expansion, trade integration
1400 0.43 8% 0.21 49% 3.9% Estimates Mali peak, Songhai rise
1500 0.48 8% 0.23 48% 3.8% Estimates Songhai expansion

Fiscal-Military Relationship Analysis

  • Fiscal capacity enables military capacity: Increasing tax revenue (0.19B → 0.48B) enables military expansion (40K-60K → 80K-100K warriors)
  • Military expenditure strains fiscal systems: Military spending ranges from 47% to 49% of tax revenue, creating moderate fiscal pressure
  • Fiscal-military cycles: Expansion cycles (Ghana, Mali, Songhai) → Fiscal capacity enables military expansion
  • Fiscal sustainability: Fiscal capacity enables military sustainability despite moderate fiscal pressure

Comparative Context

  • Regional average (Africa, 1000 CE): ~8% tax-to-GDP ratio
  • Global average (1000 CE): ~6-10% tax-to-GDP ratio
  • Ranking: Moderate fiscal capacity globally (800-1500 CE, 5th-6th largest economy)
  • Tax-to-GDP ratio: Moderate (8%) for pre-modern period
  • Military spending as % of GDP: Moderate (3.8-3.9%) for pre-modern period
  • Comparison to other civilizations (1000 CE):
    • Southeast Asian/Maritime: ~Similar tax-to-GDP ratio (Southeast Asian/Maritime ~8%)
    • Mesoamerican: ~Similar tax-to-GDP ratio (Mesoamerican ~8%)

Fiscal System Characteristics

  • Trade-based taxation: Primary revenue source (trade tolls, gold trade taxes, trans-Saharan trade)
  • Agricultural taxation: Important revenue source (land taxes, grain taxes)
  • Trade route control: Fiscal systems based on trade route control and taxation
  • Monetary taxation: Limited (primarily in-kind taxation, some gold-based)
  • Trade network integration: Fiscal systems integrated with trade networks (see Trade Networks as Civilizational Connectors and Transformers [trade-network-dynamics])

Key Events

  • 800-1000 CE: Ghana expansion period - Fiscal capacity growth (tax revenue $0.19B → $0.29B), trade-based systems
  • 1000-1200 CE: Ghana peak and Mali expansion - Fiscal capacity growth (tax revenue $0.29B → $0.38B), continued trade integration
  • 1200-1400 CE: Mali expansion period - Fiscal capacity growth (tax revenue $0.38B → $0.43B), trade integration
  • 1400-1500 CE: Songhai expansion period - Fiscal capacity growth (tax revenue $0.43B → $0.48B), imperial coordination
  • Event-data integration: Fiscal capacity growth (tax revenue $0.19B → $0.48B) linked to Ghana expansion (800-1000 CE), Mali expansion (1200-1400 CE), and Songhai expansion (1400-1500 CE), with trans-Saharan trade integration enabling fiscal capacity

Tax Revenue† (billions_1990_intl_dollars, 800-1500)

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (5 points)
YearValueSource
800~0.19Estimates
1000~0.29Estimates
1200~0.38Estimates
1400~0.43Estimates
1500~0.48Estimates

Tax-to-GDP Ratio† (percent, 800-1500)

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (5 points)
YearValueSource
800~8Estimates
1000~8Estimates
1200~8Estimates
1400~8Estimates
1500~8Estimates

Military Expenditure† (billions_1990_intl_dollars, 800-1500)

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (5 points)
YearValueSource
800~0.09Estimates
1000~0.14Estimates
1200~0.18Estimates
1400~0.21Estimates
1500~0.23Estimates

Military % of Tax Revenue† (percent, 800-1500)

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (5 points)
YearValueSource
800~47Estimates
1000~48Estimates
1200~47Estimates
1400~49Estimates
1500~48Estimates

Military % of GDP† (percent, 800-1500)

  • Some values are estimates (interpolated or inferred); each carries a method and confidence in the table (hover the ~).
Data table (5 points)
YearValueSource
800~3.8Estimates
1000~3.9Estimates
1200~3.8Estimates
1400~3.9Estimates
1500~3.8Estimates
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 (40K-60K → 80K-100K warriors) but military expenses create moderate fiscal pressure
  • Tax-to-GDP ratio stable at ~8%, demonstrating consistent fiscal systems
  • Military spending ranges from 47% to 49% of tax revenue, creating moderate fiscal pressure but enabled by fiscal capacity
  • Trade-based fiscal systems demonstrate distinctive fiscal-military relationship (trade route control 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.