This book was first published in 2009. Commercial Agreements and Social Dynamics in Medieval Genoa is an empirical study of medieval long-distance trade agreements and the surrounding social dynamics that transformed the feudal organization of men-of-arms into the world of Renaissance merchants. Drawing on 20,000 notarial records, the book traces the commercial partnerships of thousands of people in Genoa from 1150 to 1435 and reports social activity on a scale that is unprecedented for such an early period of history. In combining a detailed historical reading with network modeling to analyze the change in the long-distance trade relationships, Quentin van Doosselaere challenges the prevailing western-centric view of development. He demonstrates that the history of the three main medieval economic frameworks that brought about European capitalism - equity, credit, and insurance - was not driven by strategic merchants' economic optimizations but rather by a change in partners' selections that reflected the dynamic of the social structure as a whole.