<p>This essay reexamines institutional segregation during the eugenics era by centering the experiences of individuals labeled “low-grade” or “unimprovable,” who have been largely excluded from both public life and historical memory. While scholarship on eugenics has emphasized sterilization, immigration restriction, and the politics of heredity, it has paid comparatively little attention to how significant intellectual disability was discursively and materially constructed within custodial institutions governed by medical and administrative authority. The essay argues that the figure of the “idiot” served as a foundational and abject category within eugenic discourse—at once a symbol of hereditary failure and a justification for the most extreme forms of confinement, neglect, and disappearance. Drawing on archival records, investigative reports, and disability theory, it contends that institutional practices were not merely pragmatic responses to dependency, but enactments of symbolic violence designed to isolate, dehumanize, and disappear those considered beyond education, labor, or personhood. It critiques the historiographical tendency to focus on the injustice of confining those misclassified as “feeble-minded,” while neglecting the lives and deaths of persons with significant intellectual disabilities. In doing so, the essay challenges assumptions about agency, intelligibility, and what counts as a life worth narrating or grieving.</p>