Although the 'civic' and 'ethnic' brands of nationalism are frequently contrasted, the origins of the civic/ethnic dichotomy remain under-theorised. By building upon Michel Foucault's The History of Sexuality, Volume 1, this article argues that, during the eighteenth century, the articulation of power shifted across the board from a pre-modern control over the ending of life, to a modern expression of power as control over the production of life (dubbed 'bio-power' by Foucault). Given the Foucauldian claim that power is built upwards from 'its most infinitesimal mechanisms', it is suggested that expressions of bio-power were first enacted in that social structure most amenable to biological manipulation-the family-and then expanded upwards towards the widest understanding of a kin collective - the ethnic group. As the shift to bio-power took hold, so too did visions of the political nation-state begin to take shape in Eastern Europe. A fusion of doctrines of self-determinism with the expression of power as 'control over the production of life', then saw the ethnic nation-state gain credence as a social and political construct in Central and Eastern Europe. This article takes Romania as a case study through which the mechanisms of this exploratory argument can be illustrated.