Chronic boredom is closely linked with psychological depression. Terminal boredom is unlikely to be dramatic. It is doubtful if anyone ever died of boredom in the relatively trivial everyday sense of the word, but it does predispose people to act in life-destructive ways. When human beings are subjected to solitary confinement and sensory deprivation, they are often brought to the brink of despair and self-destruction. Voluntary states of sheer boredom have been cited as causes of suicide, accidents, and wanton violence, in the case of individuals, and cultural deterioration and war, in the case of societies.
The effect of boredom on a large scale in history is underestimated. It is the main cause of revolutions.