Chapter 2 canvasses the debates surrounding the increasingly pluralised crime control landscape of Western democratic states. In particular, it explores the role of private actors in controlling crime—and describes the fundamental change in the way public authorities deliver security services using networked approaches. This chapter advocates for an expansion of the theoretical discussions of security networks to consider the implications of social structures, and in particular, extrapolates upon the role of relational factors that might influence crime control outcomes. Given the importance that some scholars place on social capital and collective efficacy as a catalyst for cooperative engagement in crime prevention, it is argued in this chapter that a better integration of these concepts into theoretical discussions of public-private partnerships is warranted.