Civilization Simulation Loop
The long‑arc execution cycle governing civilization‑scale evolution#
The civilization simulation loop defines how a civilization unfolds through time.
It does not simulate daily life.
It simulates historical motion — rise, consolidation, overextension, fracture, collapse, and transformation.
This loop is the metronome of history.
Purpose#
The civilization simulation loop exists to:
- synchronize all civilization‑scale subsystems
- integrate city‑level outcomes into macro trajectories
- enforce S/E/R coherence across generations
- propagate slow feedback, memory, and regime shifts
- support historical replay and speculative futures
Without this loop, civilizations are snapshots.
With it, civilizations become processes.
Loop as Substrate Expression#
The civilization loop expresses the substrate at maximum scale:
- Structure (S) — institutions, city networks, trade routes, power topology
- Activation (E) — expansion pressure, conflict intensity, innovation surges
- Relational Time (R) — generational cadence, memory depth, recovery lag
Each iteration advances the civilization one historical phase.
Canonical Civilization Loop Phases#
Each civilization step proceeds through the following ordered phases.
1. External World Context Update#
Update the broader environment.
Includes:
- planetary ecology
- neighboring civilizations
- climate trends
- technological frontier
Civilizations never evolve in isolation.
2. City Network Aggregation#
Aggregate city‑level outcomes.
Includes:
- city growth and decline
- unrest propagation
- economic specialization
- infrastructure health
Cities act as sensors and actuators.
3. Resource & Ecological Balance Update#
Evaluate civilization‑scale resource flows.
Includes:
- extraction rates
- ecological regeneration
- trade dependencies
Overshoot here defines collapse trajectories.
4. Economic & Trade System Update#
Update macro‑economic structure.
Includes:
- trade network health
- capital concentration
- inequality persistence
Economic structure hardens over time.
5. Population & Cultural Dynamics Update#
Update demographic and cultural patterns.
Includes:
- population growth or decline
- migration
- identity cohesion or fragmentation
Culture carries long‑term memory.
6. Governance & Institutional Evolution#
Update institutional capacity.
Includes:
- legitimacy trends
- administrative reach
- reform or rigidity
Institutions age slower than cities — but break harder.
7. Innovation & Technology Diffusion#
Update technological state.
Includes:
- innovation emergence
- diffusion speed
- disruption pressure
Innovation reshapes structure and time.
8. Inequality & Stratification Update#
Update long‑arc distributional gradients.
Includes:
- elite consolidation
- peripheral neglect
- recovery asymmetry
Inequality compounds across generations.
9. Conflict & Expansion Dynamics#
Evaluate external and internal conflict.
Includes:
- military pressure
- territorial expansion
- internal fracture
Conflict accelerates regime transitions.
10. Feedback Loop Resolution#
Apply civilization‑scale feedback.
Includes:
- stabilizing traditions
- amplifying overextension
- adaptive reform
Feedback determines historical direction.
11. Regime Evaluation & Transition#
Evaluate civilization regime state.
Includes:
- stability basin shifts
- fragmentation thresholds
- collapse or renewal paths
This phase defines historical epochs.
12. Memory & Legacy Persistence#
Commit long‑arc memory.
Includes:
- institutional scars
- cultural narratives
- infrastructural inertia
Civilizations remember long after actors are gone.
13. Time Advancement#
Advance civilization time.
Includes:
- generational increment
- epoch counters
- horizon recalibration
History moves forward one irreversible step.
Loop Timing & Resolution#
The civilization loop operates at coarse resolution:
- decades
- generations
- centuries
City simulations may run many cycles per civilization step.
Intervention Points#
Civilization‑scale interventions include:
- institutional reform
- ecological restoration
- redistribution
- technological redirection
Interventions alter future epochs, not present crises.
Failure & Termination Conditions#
The loop may detect:
- irreversible collapse
- fragmentation into successor civilizations
- stable long‑term integration
- transformation into a new civilizational form
Termination is a historical outcome, not an error.
Integration Notes#
The civilization simulation loop:
- sits above city simulation loops
- aggregates cross‑domain dynamics
- enforces deep‑time coherence
- enables historical replay and foresight
This file is the bridge between cities and history.
Status#
Canonical civilization‑scale simulation loop definition.
Designed for analytical models, historical simulation, and speculative futures.