Total social isolation in monkeys.

Human social isolation is recognized as a problem of vast importance. Its effects are deleterious to personal adjustment, normal heterosexual development, and control of aggressive and delinquent behaviors. Isolation generally arises from breakdowns in family structures resulting 'in orphaned or semiorphaned .children or in illegitimate children who, for one reason or another, are raised in institutions, inadequate foster homes, or, occasionally, in abnormal homes with relatives.