[eng] This monograph on effective family-based prevention interventions is a collection of papers on socio-educational prevention programmes concerning behavioural problems, drug abuse, and other problem behaviour that can compromise evolutionary development in childhood and in adolescence. These are interventions based on evidence from research, in relation to the practice of positive parenting, fundamentally within the family context. And also in other contexts in which the family is not present in the everyday life of children and adolescents temporarily, as is the case of the professional parenting practised in children's homes. The importance of taking into account the family as an objective in drug prevention programmes began to gain significant support in the 90s, as explained by Israelashvil in this monograph.