John Bowlby occupies a singular position within the depth-psychology corpus as the architect of Attachment Theory — a framework that remapped the terrain between psychoanalysis, ethology, and empirical developmental science. The library treats Bowlby not as a minor revisionist but as a paradigm-creator in the Kuhnian sense: one whose concept of maternal deprivation, whose articulation of the internal working model, and whose insistence on observable environmental reality over endogenous fantasy forced a fundamental reckoning with classical Freudian and Kleinian metapsychology. Across the corpus, Bowlby appears as both biographical subject and theoretical force: his early clinical encounters with delinquent children, his tempestuous relationship with the British Psychoanalytical Society, his synthesis of Darwin’s empiricism with object-relations sensibility, and his sustained moral commitment to child welfare are all rendered as inseparable from the theory itself. Key tensions pervade the literature: attachment versus drive theory; empirical observation versus hermeneutic interpretation; Bowlby’s measured scientism versus the Kleinian emphasis on inner phantasy. Later contributors — Ainsworth, Fonagy, Main, Schore, Siegel — extend, neurobiologize, or clinically operationalize his framework, testifying to its generative fertility while also marking the distance traveled from Bowlby’s own foundational formulations.