The ‘good object’ stands as one of the most generative and contested constructs in the depth-psychological tradition, its meaning shifting substantially across theoretical lineages. In Melanie Klein’s foundational formulations — developed most fully in ‘Envy and Gratitude’ — the good object is not a simple positive representation but a structuring force within the nascent ego: the introjected ‘good breast,’ felt as whole and sustaining under the dominance of libidinal experience, acts as a ‘focal point in the ego,’ counteracting splitting, enabling integration, and furnishing what Klein regards as the indispensable foundation for psychic stability throughout life. The term thus carries ontological weight: to lack a securely established internal good object is, for Klein, the condition of the schizophrenic — unable to rely on self or world alike. Envy complicates the picture decisively: primary envy attacks and spoils precisely the good object one most needs, converting idealization into a precarious substitute. Fairbairn, as transmitted through Flores, recasts the concept structurally, locating the ‘good object’ within a tripartite libidinal ego system — the exciting libidinal object to which the repressed libidinal ego is attached — generating a specifically object-relational account of compulsive repetition. Winnicott’s tradition inflects the term environmentally, stressing the holding matrix that permits good-object internalization. The question of whether the good object can be established, maintained, and mourned anchors much of clinical thinking about character formation, depression, and therapeutic possibility.