Large-group thinking brings together different contexts - psychological, politico-economic and socio-cultural, and certain types of social insight, which P. B. de Mare terms outsight, can only emerge in the meaningful context of the large group. It is clearly pointed out by Pierre Turquet that the individual who is unable to adapt successfully to the large-group situation passes into a state of relative psychological isolation within the group. The isolation-fusion dilemma causes him great psychological stress. A description of the way in which the small group has explored and coped with these deeply felt and highly charged topics is fed back to the large group and thereby deepens and intensifies the emotional current that flows through the communicational network. The concept of community was disregarded when the large psychiatric hospitals were established in the nineteenth century, the century during which sociology had rediscovered the concept of community.