This event by the World Health Organization (WHO), WHO’s UK-based Collaborating Centres in Violence Prevention and Investment in Health and Wellbeing, together with University College London’s (UCL) Division of Psychology and Language Sciences, will bring together presentations from global experts in the study of adverse childhood experiences (ACEs), neuroscience, developmental psychology, and public health to elucidate and promote discussions on unifying definitions, impact, societal cost burden, and prevention.