According to Professor Rolf Loeber of the University of Pittsburgh School of Medicine: “There is increasing evidence for an important critical period that occurs early in children's lives. At that time, youngsters' attachment to adult caretakers is formed. This helps them to learn prosocial skills and to unlearn any aggressive or acting out behaviors.”1)
The early experience of intense maternal affection is the basis for the development of a conscience and moral compassion for others. Children whose mothers are distant emotionally or physically tend to have behavior problems and are more likely to commit crimes.2) If a child's emotional attachment to his or her mother is disrupted during the first few years, permanent harm can be done to their capacity for emotional attachment to others. They will be less able to trust others and throughout their lifes will stay more distant emotionally from others. Children who do not have a close relationship with their mothers are more likely to have psychological and behavioral problems.3) Having many different caretakers during the first few years can lead to a loss of this sense of attachment for life and to antisocial behavior.4) Separation from the mother, especially between six months and three years of age, can lead to long-lasting negative effects on behavior and emotional development. Severe maternal deprivation is a critical ingredient of juvenile delinquency: As John Bowlby, the father of attachment research, puts it, “Theft, like rheumatic fever, is a disease of childhood, and, as in rheumatic fever, attacks in later life are frequently in the nature of recurrences.”5) A child's emotional attachment to their mother is powerful in other ways. For example, even after a period of juvenile delinquency, a young man's ability to become emotionally attached to his wife can make it possible for him to turn away from crime.6) This capacity is rooted in the very early attachment to his mother. We also know that a weak marital attachment resulting in separation or divorce accompanies a continuing life of crime.7)
Many family conditions can weaken a mother's attachment to her young child. Perhaps the mother herself struggle with emotional detachment.9) The mother could be so lacking in family and emotional support that she cannot fill the emotional needs of the child. She could return to work, or be forced to return to work, too soon after the birth of her child. Or, while she is at work, there could be a change in the personnel responsible for the child's day care. The more prevalent these conditions, the less likely a child will be securely attached to his mother and the more likely he will be hostile and aggressive.10)
The mother's relationship with her children during this early period is also relevant to the debate over child care. According to Professor James Q. Wilson of the University of California at Los Angeles, the extended absence of a working mother from her child during the early critical stages of the child's emotional development increases the risk of delinquency.11) Specifically, say Stephen Cernkovich and Peggy Giordano, “maternal employment affects behavior indirectly, through such factors as lack of supervision, loss of direct control, and attenuation of close relationships.”12) Thus, forcing a young single mother to return to work too soon after the birth of her baby is bad public policy.