CONCEPT
The Bottleneck
The narrow channel of working memory through which every human thought, every cathedral, every legal code, and every software system has been forced to pass — the fixed cognitive constraint that shaped the architecture of every institution humans have ever built.
Every complex system in the history of human civilization was designed, whether its designers knew it or not, to accommodate a constraint they could not see. The constraint was cognitive:
Miller's seven-item limit on working memory. Its influence on the design of human institutions is so pervasive that pointing it out feels like pointing out that buildings are designed to accommodate gravity. A military squad contains eight to twelve soldiers. A committee functions well with five to nine members. A manager can effectively supervise
between five and nine direct reports. These numbers were not chosen by someone who had read Miller's paper. They emerged independently across cultures because they reflect the number of relationships a human mind can actively track in real time. The bottleneck does not merely constrain individual thought; it constrains the architecture of every social system built by thinking individuals. Organizations, markets, legal systems, software architectures are all, at bottom, mechanisms for distributing