collective depression collective depression collective depression is one of many collective mental states, such as collective elation, collective paranoia, collective trauma, or collective grief, which may affect a group, community or whole nation. it is characterised by a prevailing and seemingly permanent sense of inadequacy, despondency, lack of vitality, sadness and hopelessness, shared by a high proportion of the members of a collectivity. as shown by gustave le bon in 1895, it can be passed by contagion, in a way similar to a physical condition. information collective depression is often found in detained communities, such as ghettos, concentration camps or other places where all prospects of release are extremely improbable, and is recognisable by a high incidence of suicide. there is debate over the philosophical status of the concept: while sigmund freud, carl jung, franz borkenau and many others accepted the existence of a collective mind or collective unconscious, much modern thinking treats collective depression as an aggregate of individuals depressions. however, there is growing interest in the concept of mass sociogenic illness where a physical or psychological condition is observed to spread within a group without a common organic cause. treatment the remedy for collective depression is the restoration of hope, though this may be a task beyond the capabilities of any leader of a community. collective depression can also be a state of considerable vulnerability, as destructive strategies may be clutched at through misplaced belief in the efficacy of radical measures.