Sleep and diet deprivation uses controlled schedules and restricted food to physiologically wear a person down, degrading judgment and raising suggestibility. It is often disguised as discipline, devotion, fasting, or the “intensity” of a transformative program — long sessions, early mornings, late nights, sparse or unusual meals — so that exhaustion is reframed as breakthrough rather than recognized as depletion. Lifton and later researchers documented physiological stress as a recurring component of coercive persuasion, working alongside isolation and dependency rather than alone (Lifton, 1961; Singer, 1995).
The effect is not mystical; it is well-established physiology. Sleep deprivation reliably impairs attention, working memory, emotional regulation, and complex decision-making, and it increases susceptibility to error and to others’ influence (Walker, 2017; Killgore, 2010). Inadequate nutrition compounds the impairment. In this depleted state, critical thinking narrows and the pull to comply, agree, or “surrender” strengthens — which is precisely why high-control settings often schedule their most consequential requests (confessions, commitments, donations) for the moments when members are most worn down.
Recognition is straightforward once the frame is named: a setting that structurally prevents you from sleeping or eating normally is impairing your capacity to make decisions, whatever its stated purpose. The protective rule follows directly — treat impaired-judgment conditions as a stop signal, defer any significant decision until you have rested and eaten, and protect sleep and food as non-negotiable rather than as evidence of weak commitment. Stepping out to recover restores the judgment the environment is degrading; for group-related concerns ICSA can help, and any medical or psychological emergency warrants immediate care via local services or 988.