Fifty years ago this month one of the century's most controversial figures died: Sigmund Freud, the founder of psychoanalysis. He has been celebrated as a genius or condemned as a charlatan, but one thing is certain: he cannot be ignored.

Freud's influence has been overwhelming. His views have informed issues and debates in every field of knowledge dealing with human affairs, and have contributed to forming present-day 'common sense'. His views have influenced many of the institutions that are a part of our social world. Child care clinics and a whole apparatus of systems to intervene in the family have been established in the belief that a healthy child requires certain sorts of experiences. Other institutions that deal with the problems encountered by adults, such as psychiatry, social work and clinical psychology, have been influenced in how they conceive of the problem and its treatment.