The idea people argue about
Mokyr's most contested claim is that a change in beliefs about useful knowledge helped make modern economic growth possible in Europe. A common objection is that this gives ideas too much causal weight compared with coal, colonies, wages, state capacity, institutions, and access to trade. Mokyr answers that culture is not a national personality or an isolated first cause: it works through incentives, institutions, communication, and communities that reward inquiry and application. His Republic of Letters matters because it made claims contestable across borders and connected learned knowledge with practical improvement. He also compares Europe with China to explain why knowledge systems developed differently without claiming that Europeans possessed greater innate ability. The dispute remains one of causal balance, since the book shows how intellectual norms can amplify material opportunities more readily than it can assign a precise share of industrial growth to culture alone.