The main area of inquiry for this thesis is super-maximum security prisons or as commonly referred to “supermax prisons”. First, the thesis traces the shift from the use of physical punishment to the use of disciplinary measures in punitive institutions and the development of the modern prison until it reaches its latest form as embodied in the supermax model. Secondly, the design, characteristics, and conditions of these prisons are also explored to demonstrate how they systematically contribute to the dehumanization and depersonalization of prisoners. These institutions are subsequently found to represent physical spaces of the lawless “state of exception” that reduces inmates to a “bare” animal-like form of living through depriving them of all the rights and prerogatives granted to them by law. Third, the thesis analyzes the penological rationale commonly invoked to justify supermax prisons and concludes that it suffers from a clear deficiency in demonstrating any evidence-based credibility. Finally, the thesis sheds light on the devastating and long-lasting impacts of supermax confinement on mental health and argues that it may be in violation of fundamental human rights such as the right against torture and other cruel, inhumane, and degrading treatment or punishment as provided by international law.