A Concise Explanation of the Great Divergence Problem

Why did sustained economic growth and the Industrial Revolution emerge in western Europe rather than in equally advanced early‑modern economies such as China? The "Great Divergence" puzzle has generated decades of scholarship but no consensus that is both logically tight and free of cultural essentialism. This short paper presents a parsimonious explanation built on two simple premises: (1) knowledge comes in two kinds that spread at different speeds—practical know‑how moves easily with artefacts, while institutional know‑how requires person‑to‑person transmission; (2) the global network topology before and after 1492 determined which societies had access to a dense, multi‑centre institutional‑innovation engine and which were canalised into a single institutional attractor. A phase transition triggered by the European seizure of the Atlantic sea routes fed a pre‑existing multi‑polar European network with new resources and insulated it from competition, while simultaneously starving the long‑unified Chinese sphere of external institutional variety. The model yields a formal innovation‑rate equation, clarifies the effective‑distance metric that defines network links, and extends naturally to topics as diverse as the AI race and the challenge of permanent space settlement.