Early life and career
John Bowlby was born in London in 1907 into an upper-middle-class family in which, as was common at the time, the children were largely raised by nannies and saw little of their parents. That early experience of separation would quietly inform his life’s work. He trained in medicine and then in psychoanalysis, and worked with emotionally disturbed and delinquent children, where he was struck again and again by how many had suffered early disruptions of care. In 1951 he wrote an influential report for the World Health Organization on maternal deprivation, arguing that a warm, continuous relationship with a primary caregiver was essential to mental health.
Attachment theory
Bowlby’s central claim broke with the thinking of his day. Psychoanalysis had assumed the infant bonds with the mother because she feeds it. Bowlby argued instead that the need for attachment is primary in its own right, a biologically evolved system, as fundamental as hunger, whose purpose is to keep the vulnerable infant close to a protective adult. He drew on ethology, the study of animal behaviour, including Konrad Lorenz’s work on imprinting and Harry Harlow’s experiments showing that infant monkeys sought comfort over food. Attachment, for Bowlby, is about survival, safety and the regulation of fear.
The secure base
One of his most enduring ideas is the secure base. A child who trusts that its caregiver is reliably available can use that relationship as a base from which to explore the world, returning when frightened or tired. When the bond is threatened, the child moves through a recognisable sequence of protest, despair and, if separation continues, detachment. The same dynamic, Bowlby saw, plays out throughout life: we all function best when we have a secure base to return to.
Separation and loss
Bowlby set out his thinking in a landmark trilogy, Attachment (1969), Separation (1973) and Loss (1980), tracing the bond from its formation through the anxiety of separation to the grief of bereavement. His work on loss reshaped how we understand mourning, not as something to be got over, but as a process of gradually reorganising an inner world around an absence.
Mary Ainsworth and attachment styles
Bowlby’s ideas were given empirical form by his collaborator Mary Ainsworth, whose “Strange Situation” experiment observed how infants responded to brief separations from their mothers. From this emerged the description of attachment patterns, secure, anxious-ambivalent and avoidant, with a fourth, disorganised, identified later, the pattern most closely linked to frightening or unpredictable early care. These patterns, formed in infancy, tend to echo through the way we love, trust and seek closeness as adults.
His influence
Attachment theory is now foundational across developmental psychology, psychiatry and psychotherapy. It gives a clear account of something every therapy encounters: that our earliest relationships lay down templates for all the others. Bowlby’s work sits alongside that of Donald Winnicott and Melanie Klein in the broad tradition that takes the early relationship with the mother as decisive for the psyche.
Attachment and the work of therapy
The hopeful part of Bowlby’s legacy is that attachment patterns, though formed early, are not fixed. A consistent, attuned therapeutic relationship can, over time, offer the secure base that was missing, and allow a more secure way of relating to be built. That is much of what happens in depth work. Jungian analysis provides exactly this kind of reliable relationship in which old patterns can be understood and slowly repaired. The Jungian Confrerie is the practice of Dr Philippe Jacquet, offering work with a Jungian analyst in central London and online worldwide.