Part 7: Cities as Metabolic Organisms

Cities in this repository are not metaphors pretending to be biology. They are multi-layer control systems with throughput, dissipation, memory, and failure cascades.

A city metabolizes energy, food, trust, and attention. It scars. It forgets. It develops compensation patterns that later become pathology.

Four functional layers

1. Circulation: power, logistics, transit, data pathways.
2. Immune function: vetoes, firewalls, refusal channels.
3. Endocrine signaling: policy pulses, incentives, emergency directives.
4. Memory tissue: archives, scars, rituals, non-exportable local knowledge.

Pathologies

• Optimization fever: throughput gains consume review bandwidth.
• Trust necrosis: people comply outwardly and defect inwardly.
• Sensor autoimmunity: everything anomalous treated as hostile signal.
• Archive fibrosis: memory accumulates until adaptation stalls.

Design implication

Vital systems are not only pipes and watts. Informal rooms, kitchens, and rituals are metabolic organs. Remove them from the model and the model becomes dangerous precisely where survival is social.