Disciplinary power is a form of power that acts on the subject through regimes of bodily regulation subject to surveillance, in order to bring their conduct into conformity with a norm. The exemplary diagram of such power is provided by Bentham's Panopticon' (Foucault, 1977), in which the permanent visibility of the prisoner is combined with their inability to know whether, at any given moment, they are being watched and judged in their performance of a norm. This mode of power spread from the prison to the workhouse, the hospital, the factory and, Foucault argues, eventually permeated modern society.