Three degrees of separation: networks in the city of Babylon during the Reign of Darius I (522–486 BCE)

Abstract In this paper, I reconstruct the networks of Babylonian urban dwellers during the reign of Darius I (522–486 BCE) based on 803 tablets from 10 private archives in Babylon. The main aim is to examine the structure and connectivity of the network that connected different urban families and groups of individuals outside the families. I focus on the positions individuals occupied within the network that yielded them the power to connect smaller parts of the network. The first approach used to identify and analyze these positions is the betweenness centrality measure. The second approach is the analytic concept of brokerage, the role of mediating between two or more individuals or communities that would otherwise have no connection to each other. I identify differences in the ways that the intermediate position of brokers affected the formation of the network. These brokerage roles resulted from families’ strategies to increase their household wealth by constructing and optimizing marriage, prebendary, and business relations.