Early relational trauma occupies a foundational position in the depth-psychology corpus, designating the class of injuries sustained within the infant-caregiver dyad before explicit memory, language, or coherent narrative become available as integrative resources. The literature converges on several interlocking propositions: that such trauma is registered somatically and autonomically before it can be symbolized; that its effects are cumulative, with prenatal, perinatal, and attachment-phase injuries compounding one another; and that standard PTSD nosology systematically underestimates its pervasiveness and specificity. Heller and LaPierre provide the most systematic taxonomy, organizing the sequelae into five adaptive survival styles and insisting that the resulting dysregulations are physiological as much as psychological. Schore, Ogden, and Lanius converge on the right-hemispheric, subcortical substrate of these injuries, while Herman’s longitudinal data establishes disorganized attachment—not abuse alone—as the critical predictor of later dissociation and borderline symptomatology. Gabor Maté extends the argument culturally, situating early relational wounding within broader social ecologies of separation and neglect. Across all positions, the consensus holds that healing requires relational re-experience—a new dyadic matrix capable of reaching wounds that predate verbalization—and that somatic, bottom-up interventions are indispensable complements to narrative work.