CONCEPT
Cognitive Density Amplification
Geoffrey West's urban scaling insight applied to AI: a large language model compresses the output of millions of human minds into a conversational interface, increasing the effective density of cognitive connection per person per unit of time beyond what any physical city has ever produced—with the same superlinear consequences for both innovation and pathology.
What makes a city productive is not its infrastructure but the density of its social interactions—the collisions between minds carrying different information, skills, and intentions that occur per person per unit of time.
Superlinear scaling in cities arises because connection density scales faster than population, and each connection has a probability of producing something novel. Cognitive density amplification names what happens when this mechanism escapes its physical substrate. A
large language model does not require a city—it delivers, through a conversational interface, the cognitive equivalent of being in a room with the aggregated intellectual output of computer science, economics, biology, literature, and a hundred other domains simultaneously. A developer in Lagos using
AI tools is not merely gaining access to a coding assistant; she is gaining access to a cognitive network whose effective density exceeds that of any physical city on