The selfobject concept — Heinz Kohut’s foundational contribution to self psychology — receives its most sustained treatment in the depth-psychology corpus through the lens of clinical application, developmental theory, and comparative critique. Kohut’s core claim, that the nascent self requires empathically attuned objects whose functions are experienced as part of the self rather than as separate others, generates a broad field of inquiry across the passages. Flores applies the construct most directly, tracing how mirroring, idealizing, and twinship selfobject needs — when chronically unmet — produce the psychic deficits underlying addictive behavior, and arguing that therapeutic relationships, AA communities, and group therapy serve as reparative selfobject environments. Samuels subjects the concept to comparative scrutiny, measuring Kohut’s developmental account of narcissism and its self-objects against Jungian archetypal theory, exposing genuine incommensurabilities at the level of a priori versus constructed selfhood. Schore, while never deploying the term directly, provides its neurobiological substrate: the empathic caregiver functioning as the infant’s regulatory environment is precisely the living prototype of the selfobject relationship. Tensions in the corpus revolve around whether selfobject needs are lifelong and growth-promoting or residually pathological, whether the concept translates across theoretical vocabularies, and whether structure-building through ‘optimal frustration’ adequately accounts for deep relational repair.