who are most likely to profit from interventions, which is important because successful prevention programmes usually require extensive and intensive, and thus expensive, interventions. Interventions could conceivably involve genetic engineering that alters DNA although so far gene therapy in the human species has proven difficult even for single-gene disorders. Behavioural engineering and environmental engineering are more like to pay off in preventing behavioural problems affected by many genes as well as many environmental factors (Goncalves, 2005).
