Do trials of preventive social-developmental interventions in childhood, implemented in their early childhood years, have positive outcomes on behavioural and health outcomes into adulthood? Are these changes sustained years after the end of the intervention and do these benefits continue to have an impact across generations? In a non-randomised, controlled, longitudinal interventional study, Hill GK et al [JAMA Pediatr 2020;174(8):764–771.doi:10.1001/jamapediatrics.2020.1310] examined outcomes on the offspring of individuals who participated in the Raising Healthy Children preventive intervention as children in the 1980s. These subjects were now adults with their own children. …