text: This coincided with Foucault 's turn to the study of disciplinary institutions , with a book , Surveiller et Punir ( Discipline and Punish ) , which `` narrates '' the micro-power structures that developed in Western societies since the 18th century , with a special focus on prisons and schools .
simplified: Foucault then wrote Surveiller et Punir ( Discipline and Punish ) , about prisons and schools .