““In Separation, the second volume of his great trilogy on attachment, John Bowlby described what had been observed when ten small children in residential nurseries were reunited with their mothers after separations lasting from twelve days to twenty-one weeks. The separations were in every case due to family emergencies and the absence of other caregivers, and in no case due to any intent on the parents’ part to abandon the child. In the first few days following the mother's departure the children were anxious, looking everywhere for the missing parent. That phase was followed by apparent resignation, even depression on the part of the child, to be replaced by what seemed like the return of normalcy. The children would begin to play, react to caregivers, accept food and other nurturing. The true emotional cost of the trauma of loss became evident only when the mothers returned. On meeting the mother for the first time after the days or weeks away, every one of the ten children showed significant alienation. Two seemed not to recognize their mothers. The other eight turned away or even walked away from her. Most of them either cried or came close to tears; a number alternated between a tearful and an expressionless face. The withdrawal dynamic has been called “detachment” by John Bowlby. Such detachment has a defensive purpose. It has one meaning: so hurtful was it for me to experience your absence that to avoid such pain again, I will encase myself in a shell of hardened emotion, impervious to love — and therefore to pain. I never want to feel that hurt again. Bowlby also pointed out that the parent may be physically present but emotionally absent owing to stress, anxiety, depression, or preoccupation with other matters. From the point of view of the child, it hardly matters. His encoded reactions will be the same, because for him the real issue is not merely the parent's physical presence but her or his emotional accessibility. A child who suffers much insecurity in his relationship with his parents will adopt the invulnerability of defensive detachment as his primary way of being. When parents are the child's working attachment, their love and sense of responsibility will usually ensure that they do not force the child into adopting such desperate measures. Peers have no such awareness, no such compunctions, and no such responsibility. The threat of abandonment is ever present in peer-oriented interactions, and it is with emotional detachment that children automatically respond. No wonder, then, that cool is the governing ethic in peer culture, the ultimate virtue. Although the word cool has many meanings, it predominately connotes an air of invulnerability. Where peer orientation is intense, there is no sign of vulnerability in the talk, in the walk, in the dress, or in the attitudes.””