This chapter lays out the geographical context in which the political dynamics explained in this book take place and examines how, in these areas the relevance of party ground-level organizations has vanished while brokers – leveraging their personal relationships with neighbors and politicians – have gained substantial social and political influence. It describes the Conurbano Bonaerense in Argentina and uses historical analysis, descriptive statistics, and qualitative fieldwork data to show the evolution of political links to areas of segregated vulnerability. It explains that, in response to the problems faced in these areas, citizens seek solutions within their own neighborhoods and communities. This process of territorialization of politics results in the increased importance of neighborhood political brokers. The distribution of state resources through the personal networks of brokers has replaced party organization in vulnerable neighborhoods where the demand for resources is almost boundless. The chapter argues that local candidates, including mayors and council city members, regardless of their political affiliations, soon realized that their chances of winning elections were higher if they had a network of brokers active in every poor neighborhood in their municipalities.