Didier Fassin, James D. Wolfensohn Professor in the School of Social Science, has authored Enforcing Order: An Ethnography of Urban Policing (Polity Press, 2013). The book, which is based on a fifteen month ethnographic study carried out by Fassin, examines lethal interactions between the youth and police during the Paris riots of 2005. Describing the invisible manifestations of violence and unrecognized forms of discrimination against minority youngsters, undocumented immigrants, and Roma people, Fassin analyzes the conditions that make them possible and tolerable, including entrenched policies of segregation and stigmatization, economic marginalization, and racial discrimination.