Panopticism is a social theory named after the Panopticon, originally developed by French philosopher Michel Foucault in his book Discipline and Punish. The "panopticon" refers to an experimental laboratory of power in which behaviour could be modified, and Foucault viewed the panopticon as a symbol of the disciplinary society of surveillance.
Jeremy Bentham proposed the panopticon as a circular building with an observation tower in the centre of an open space surrounded by an outer wall. This wall would contain cells for occupants. This design would increase security by facilitating more effective surveillance. Residing within cells flooded with light, occupants would be readily distinguishable and visible to an official invisibly positioned in the central tower. Conversely, occupants would be invisible to each other, with concrete walls dividing their cells. Due to the bright lighting emitted from the watch tower, occupants would not be able to tell if and when they are being watched, making discipline a passive rather than an active action. Although usually associated with prisons, the panoptic style of architecture might be used in other institutions with surveillance needs, such as schools, factories, or hospitals.
In Discipline and Punish, Michel Foucault builds on Bentham's conceptualization of the panopticon as he elaborates upon the function of disciplinary mechanisms in such a prison and illustrated the function of discipline as an apparatus of power. The ever-visible inmate, Foucault suggests, is always "the object of information, never a subject in communication". He adds that,
"He who is subjected to a field of visibility, and who knows it, assumes responsibility for the constraints of power; he makes them play spontaneously upon himself; he inscribes in himself the power relation in which he simultaneously plays both roles; he becomes the principle of his own subjection" (202-203).
Foucault offers still another explanation for the type of "anonymous power" held by the operator of the central tower, suggesting that, "We have seen that anyone may come and exercise in the central tower the functions of surveillance, and that this being the case, he can gain a clear idea of the way the surveillance is practiced". By including the anonymous "public servant," as part of the built-in "architecture" of surveillance, the disciplinary mechanism of observation is decentered and its efficacy improved.