Solitary confinement inmates are 6-8% of population but ~50% of suicides

People held in solitary confinement -- 22-23 hours per day alone in a cell, often for weeks, months, or years -- comprise only 6-8% of the total prison population but account for approximately half of all prison suicides. The people harmed are those placed in solitary, who develop severe psychological symptoms: a 2017-2018 study found clinically significant depression, anxiety, or guilt in half of the research sample, and between 19-34% of those exposed develop PTSD. But the harm extends beyond the individual. When these people are eventually released -- and nearly all are -- they return to communities with untreated trauma, psychotic symptoms, and an inability to function in social settings, which drives homelessness and recidivism. Wisconsin prisons saw suicide watch placements nearly double from ~1,200-1,500 per year to ~2,500 in 2024. The structural reason this persists is that solitary confinement is used as a management tool for understaffed prisons: rather than hiring enough officers to safely manage difficult inmates in general population, facilities isolate them in solitary at lower staffing ratios. It is cheaper to lock someone in a box than to provide mental health treatment or adequate supervision, so solitary becomes the default psychiatric intervention in a system that lacks actual psychiatric resources.