I am looking for a word or phrase meaning a system of social policing, the operation of which is implicit, or is explicitly hidden. Examples include:
- Salem Witch Trials.
- The Gestapo.
- Secret youth police groups in the Chinese Communist Revolution.
Preferably, I would like a word or phrase that is both precise and non-dramatic. Usage:
The social pressure toward political homogeneity in this company forms a _______ .