"Robins documented the potential stability of conduct disorder, finding that many troubled children and adolescents display anti-social personalities as adults along with other types of psychopathologies. However, he also observed the possibility of positive change and better outcomes in some individuals. Robins's findings have been replicated many, many times in other longitudinal studies; the stability of conduct-disordered behavior, especially related to aggression and callous-unemotional characteristics, is abundantly clear across individuals and across generations. " (Disorders of Childhood: Development & Psychopathology -- Parritz, 2014)