Down and out: Social marginality and homelessness.

Discusses the development of systems of comprehensive care for different categories of socially marginal people, and focuses on those aspects which in themselves may not be psychiatric in nature, but may be subject to the `social control' function of the system. Difficulty in assessing the number of people involved; Rapid changes of the ecology of social marginality; Paradox of much psychiatric care; Importance of community's responsibility; Changing comprehensive services.