City-States

A political structure where a single city and its surrounding territory forms an independent state with its own government and military.

Core metadata

ID: city_states
Era: Ancient
First known date: -3000 (century)
Region: Global / multiple regions
Review status: source_checked
Maturity: N/A

Prerequisites

Dependents

Early Dynastic Sumerian Organized Warfare (organized_warfare)

Fields

None.

Node sources

Urbanization (Encyclopaedia Britannica, 2026, textbook) • Supports: edge, node

Prerequisite edge evidence

Edge/source evidence summary:

Prerequisite edges: 3
Average edge confidence: 70%
Prerequisite sources: 2
expert_inference: 3

Prerequisite	Type	Confidence	Evidence level	Note	Sources
Urbanization (urbanization)	enabling	68%	expert_inference	Urbanization provides a capability that enables this technology without being the only possible path.	Urbanization (Encyclopaedia Britannica, 2026, textbook) • Supports: edge
Taxation and Tribute (taxation_and_tribute)	enabling	68%	expert_inference	Taxation and Tribute provides a capability that enables this technology without being the only possible path.	Taxes in the Ancient World (University of Pennsylvania Almanac / Penn Museum, 2002, museum) • Supports: edge
Early Fortifications (early_fortifications)	historical_predecessor	75%	expert_inference	Early Fortifications is an earlier historical predecessor or foundation, not a one-to-one engineering dependency.	No sources recorded.

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