Urban violence still has a peculiar standing within social and urban research. This book works to unpack the link between urban, violence, and security with three main arguments.The first is that urban violence is under-theorized because long-term theoretical problems with both of its elements (?urban? and ?violence?).The second is to answer these questions: (1) how can violence be conceptualized in a way that opens to an understanding of the specificity of urban violence? (2) What is the urban in urban violence? And (3) How can ?urban? and ?violence? be articulated in a way that makes urban violence a category with both analytical and strategic power?The third, and central, argument of this book is that, through a genealogy that articulates political economic and vital materialism, urban violence can ultimately be framed as a precise category shaped by three interlocking trajectories: the process of (capitalist) urbanization, the spatio-political project of the urban, and the concrete urban atmospheres in and through which the process and the project materialize, often violently so, in the urban.