Parental Unavailability occupies a contested and generative position across the depth-psychological corpus, appearing under such designations as emotional neglect, psychological unavailability, parental absence, and deprivation of caregiving responsiveness. Bowlby’s attachment trilogy furnishes the most systematic empirical grounding, demonstrating through clinical observation and longitudinal study that the physical or emotional absence of a parent during critical developmental windows precipitates protest, despair, and ultimately detachment in the child — sequences that, when unresolved, sediment into pathological mourning and depression in adult life. Neurodevelopmental research collected in Lanius demonstrates that parental psychological unavailability operates as a distinct etiological vector in dissociation, functioning independently of overt physical or sexual abuse. Levine extends this understanding into somatic territory, arguing that chronic unmet need in infancy produces a progressive shutdown of instinctual awareness that persists into adulthood. Hillman, characteristically adversarial toward causal linearity, complicates the picture by challenging what he names the ‘parental fallacy’ — the tendency to over-attribute character formation, whether healthy or pathological, to parental presence or absence rather than to the soul’s inherent calling. Ogden and Schore situate the consequences of unavailability in the body’s regulatory architecture and the right-hemisphere relational matrix. The term thus functions simultaneously as a traumatological category, a developmental variable, an attachment disruption, and, in Jungian critique, an explanatory idol requiring resistance.