Early child development programs can improve school readiness. Yet they can also do much more. For example, the Perry Preschool program, which was delivered to disadvantaged three- to four-year-olds, resulted in significant benefits up to 35 years after the program ended. These benefits included significantly less criminal involvement and less cannabis and heroin use. For more information, see Vol. 5, No. 4 of the Children’s Mental Health Research Quarterly.