[Deinstitutionalization and modern history].

The authors trace the history of ideological or socio-economical-political conditions of desinstitutionalisation. They try to analyse the consequence of it about the constitution of a new pathology of homeless and careless chronic mental ill. This pathology was described first in the states and Canada. It begins to be described in France. The authors go on to show it's a new kind of mental pathology, needing to take place in the new classifications of mental illness.