Medical advances have made it possible for 'life' to be maintained in an unconscious patient who has irrevocable brain damage and who might also be dependent on artificial aids to circulation and respiration. Is it now meaningless to define 'death' as the cessation of a heart beat? Why do so many people have difficulty In communicating, or in simply getting-on with other people? Psychologists have now begun to analyse aspects of social behaviour in a way which they believe will lead to more pleasant and more effective human relationships.