The "Marionization" of American prisons suggests that prison systems throughout the United States rely more and more on penal regimes that emulate or exaggerate conditions and policies found at the U.S. Penitentiary in Marion (Illinois): reportedly the "toughest prison in America." Many States maintain punishment cells, solitary confinement units, or disciplinary segregation housing, but thus far no evidence exists they operate separate facilities designed to lock up prisoners for 23 hours a day. Yet, a disturbing trend exists toward increased correctional reliance on such facilities and policies. The use of supermaximum security confinement in many States raises several important issues including the effect of reliance on supermaximum confinement prisons and the constitutionality of conditions or procedures that guide the operation of these facilities. Recommendations are made for reducing reliance on supermaximum security prisons. 12 references