The emergence of prison as the form of punishment for every crime grew out of the development of discipline in the 18th and 19th centuries, according to Foucault. He looks at the development of highly refined forms of discipline, of discipline concerned with the smallest and most precise aspects of a person's body. Discipline, he suggests, developed a new economy and politics for bodies. Modern institutions required that bodies must be individuated according to their tasks, as well as for training, observation, and control. Therefore, he argues, discipline created a whole new form of individuality for bodies, which enabled them to perform their duty within the new forms of economic, political, and military organizations emerging in the modern age and continuing to today.