The origins of attachment theory: John Bowlby and Mary Ainsworth.

Attachment theory is based on the joint work of John Bowlby (1907-1991) and Mary Salter Ainsworth (1913- ). Its developmental history begins in the 1930s, with Bowlby's growing interest in the link between maternal loss or deprivation and later personality development and with Ainsworth's interest in security theory. Although Bowlby's and Ainsworth's collaboration began in 1950, it entered its most creative phase much later, after Bowlby had formulated an initial blueprint of attachment theory, drawing on ethology, control systems theory, and psychoanalytic thinking, and after Ainsworth had visited Uganda, where she conducted the first empirical study of infantmother attachment patterns. This article summarizes Bowlby's and Ainsworth's separate and joint contributions to attachment theory but also touches on other theorists and researchers whose work influenced them or was influenced by them. The article then highlights some of the major new fronts along which attachment theory is currently advancing. The article ends with some speculations on the future potential of the theory. Attachment theory is the joint work of John Bowlby and Mary Ainsworth (Ainsworth & Bowlby, 1991). Drawing on concepts from ethology, cybernetics, information processing, developmental psychology, and psychoanalysis, John Bowlby formulated the basic tenets of the theory. He thereby revolutionized our thinking about a child's tie to the mother and its disruption through separation, deprivation, and bereavement. Mary Ainsworth's innovative methodology not only made it possible to test some of Bowlby's ideas empirically but also helped expand the theory itself and is responsible for some of the new directions it is now taking. Ainsworth contributed the concept of the attachment figure as a secure base from which an infant can explore the world. In addition, she formulated the concept of maternal sensitivity to infant signals and its role in the development of infant-mother attachment patterns. The ideas now guiding attachment theory have a long developmental history. Although Bowlby and Ainsworth worked independently of each other during their early careers, both were influenced by Freud and other psychoanalytic thinkers—directly in Bowlby's case, indirectly in Ainsworth's. In this article, I document the origins of ideas that later became central to attachment theory. I then discuss the subsequent period of theory building and consolidation. Finally, I review some of the new directions in which the theory is currently developing and speculate on its future potential. In taking this retrospective developmental approach to the origins of attachment theory, I am reminded of Freud's (1920/1955) remark: