W. R. D. Fairbairn (1889-1964) challenged the dominance of Freud's drive theory with a psychoanalytic theory based on the internalization of human relationships. Fairbairn assumed that the unconscious develops in childhood and contains dissociated memories of parental neglect, insensitivity, and outright abuse that are impossible the children to tolerate consciously. In Fairbairn's model, these dissociated memories protect developing children from recognizing how badly they are being treated and allow them to remain attached even to physically abusive parents.

Attachment is paramount in...