“…Turning to the social and/or behavioural sciences raises the question of who is the expert, and sets in motion professional rivalries that unfold in a dialectical relationship with changes in policy and practice (Jones, 2001) and the wider political landscape. In post-war Britain, the expertise was supplied by medical psychology, which was associated with psychiatry and paediatrics, and at the time informed primarily by psychoanalytical thinking (Hersov, 1986). Psycho-analysts attributed antisocial behaviour to developmental deficits: 'most delinquents are to some extent ill [because] the sense of security did not come into the child's life early enough to be incorporated into his belief' (Winnicott, 1964, p. 229).…”