Security, Territory, Population is part of a lecture series given by French philosopher Michel Foucault at the Collège de France between 1977 and 1978 and published posthumously based on audio recordings. In it, Foucault examines the notion of biopolitics as a new technology of power over populations that is distinct from punitive disciplinary systems, by tracing the history of governmentality, from the first centuries of the Christian era to the emergence of the modern nation state. These lectures illustrate a radical turning point in Foucault's work in which a shift to the problematic nature of the government of the self and others occurred. Source: Wikipedia (en)