Collective responsibility refers to responsibilities of organizations, groups and societies. Part of it is the concept known as collective guilt by which individuals who are part of such collectives to be responsible for other people's actions and occurrences by tolerating, ignoring, or harboring them, without actively engaging. This concept is found in the Old Testament (or Tanakh), some examples include the account of the Flood, the Tower of Babel, Sodom and Gomorrah and in some interpretations, the Book of Joshua's Achan. In those records entire communities were punished on the act of the vast majority of their members, however it is impossible to state that there were no innocent people, or children too young to be responsible for their deeds. The practice of blaming the Jews for Jesus' death is the longest example of collective responsibility. In this case, the blame was cast not only on the Jews of the time but upon successive generations. This comes from Matthew 27:25-66 New International Version (NIV) 25: 'All the people answered, 'His blood is on us and on our children!'' Collective responsibility in the form of collective punishment is often used as a disciplinary measure in closed institutions, e.g. boarding schools (punishing a whole class for the actions of one known or unknown pupil), military units, prisons (juvenile and adult), psychiatric facilities, etc. The effectiveness and severity of this measure may vary greatly, but it often breeds distrust and isolation among their members. Historically, collective punishment is a sign of authoritarian tendencies in the institution or its home society. For example, in the Soviet Gulags, all members of a brigada (work unit) were punished for bad performance of any of its members. Collective punishment is also practiced in situation of war, economic sanctions, etc., presupposing the existence of collective guilt. Collective guilt, or guilt by association, is the controversial collectivist idea that individuals who are identified as a member of a certain group carry the responsibility for an act or behavior that members of that group have demonstrated, even if they themselves were not involved. Contemporary systems of criminal law accept the principle that guilt shall only be personal. Others view groups as being entities in themselves (an entitative group), capable of holding guilt or responsibility independent of any of the group's members.