The panopticon was the ultimate realization of a modern disciplinary institution. It allowed for constant observation characterized by an "unequal gaze"; the constant possibility of observation. Perhaps the most important feature of the panopticon was that it was specifically designed so that the prisoner could never be sure whether they were being observed at any moment. The unequal gaze caused the internalization of disciplinary individuality, and the docile body required of its inmates. This means one is less likely to break rules or laws if they believe they are being watched, even if they are not. Thus, prisons, and specifically those that follow the model of the panopticon, provide the ideal form of modern punishment. Foucault argues that this is why the generalized, "gentle" punishment of public work gangs gave way to the prison. It was the ideal modernization of punishment, so its eventual dominance was natural.