" It manifests in diffuse and apparently random patterns of crime and violence, and in self-marginalization by city dwellers who see themselves as victims of social injustice and economic exclusion, standing apart from the mainstream—in the city, but not of it—yet still maintain a high level of connectedness both with other members in their group and with the ebb and flow of the city itself. "

― David Kilcullen , Out of the Mountains: The Coming Age of the Urban Guerrilla