The term ‘paranoid’ traverses the depth-psychology corpus along several distinct axes, none of which reduces to mere clinical description. At one extreme, Melanie Klein gives the concept its most theoretically foundational status: the ‘paranoid-schizoid position’ names the earliest developmental organization of the infant psyche, in which persecutory anxiety, splitting, and projective identification dominate. For Klein, paranoid anxiety is not pathology but ontogeny — a structural moment the ego must negotiate before depressive integration becomes possible. Bleuler situates paranoia more clinically, as one of the four major subtypes of the schizophrenias, distinguished by systematized delusion. Kalsched traces the paranoid system to psychogenic trauma, following Jung’s conviction that the encapsulated delusional world has a biographical origin in the collapse of sustaining fantasy. Hillman, characteristically, presses outward: he diagnoses an ‘inherent paranoia in the soul of the state as such,’ transforming the clinical category into a political and cosmological critique of Western consciousness. Panksepp offers the neurobiological complement, linking paranoid ideation to the mesolimbic dopamine system’s over-responsiveness under stress. Grof maps paranoid eruptions within psychedelic regression, tracing them to transpersonal and embryonal strata. Across all these voices, paranoia designates not simply false belief but a structural disturbance in the relationship between inside and outside, self and threat — a disturbance that may be infantile, political, neurochemical, or cosmological depending on the framework deployed.