John Bowlby (1907–1990) was a renowned British psychiatrist and psychoanalyst, widely regarded as the father of attachment theory. His research fundamentally changed the understanding of child development by emphasizing the importance of the emotional bonds formed between infants and their caregivers. Bowlby believed that these early relationships were crucial for the child’s psychological development and that the disruption of these attachments, such as through separation or loss, could lead to emotional and behavioral difficulties. His work, particularly his study of maternal deprivation, helped shape both child psychiatry and psychology, impacting practices in foster care, adoption, and child custody decisions.

Bowlby spent much of his career working at the Tavistock Clinic in London, where he developed and tested his ideas on attachment and loss. His theories, based on both clinical observations and insights from ethology, were initially controversial but later gained widespread acceptance. Bowlby also made significant contributions to understanding how grief and loss impact both children and adults. His pioneering work has had a lasting influence on therapeutic practices and remains central to developmental psychology today.