T he diverse papers in this issue demonstrate how currentday practice in child protection can benefit from taking a broad perspective which incorporates, among other dimensions, learning over time, from other fields of study and from other cultures.The first paper from Iwaniec and her team, describing a 20-year follow-up of non-organic failure to thrive, yields valuable information on what protects children from risk of longterm harm and allows comparison between outcomes for those who were and were not abused. Despite abuse in childhood, positive outcomes were found to be possible where the care of the child and the emotional environment had significantly improved. This did not necessarily entail the child being removed from a formerly abusive home. Such findings provide much-needed encouragement to practitioners working to help abusive families change. Studies such as this demonstrate the value of collecting and comparing data over a considerable period of time. More long-term follow-up studies of all forms of abuse and neglect are needed to inform policy and practice. However, unless the sample is recruited prospectively with informed consent, the ethical considerations can be considerable (Lynch et al., 1999). Finding funding for such long-term research is also a major issue, exacerbated by grant-giving bodies, research institutions and researchers themselves all looking for a quick return on their investment. Under pressure from research assessment exercises, few will be willing to wait 20 years for the definitive publication! It is to be hoped that, should a centrally funded research programme in child protection be developed in the wake of the Climbié Inquiry, then long-term outcomes will be included as a priority.In the second paper in this issue, Adshead, a psychotherapist in a high-security hospital, raises the contentious issue of personality disorder and explores its relevance to parenting and the protection of children from dangerous adults. Since the paper was written, the terminology 'dangerous and severe personality disorder' (DSPD) has been dropped from the proposed Mental Health Act reform, but the new legislation is still likely to remove the requirement for people to be 'treatable' before they can be detained. The term DSPD is retained to describe the units being developed to accommodate these 'The value of collecting and comparing data over a considerable period of time'