Peter A. Levine’s Waking the Tiger describes trauma not primarily as a psychological problem, but as something that becomes stuck in the nervous system. According to Levine, trauma arises when a person becomes overwhelmed and the body cannot complete a stress response. Energy intended for fighting, fleeing, or freezing then remains stuck, as it were.
Levine looks extensively at animals in nature in this regard. A wild animal can often tremble, shake, or take a deep breath after danger, after which the nervous system calms down again. People often suppress such reactions due to fear, shame, or social expectations. As a result, tension remains present in the body, and symptoms such as anxiety, hyperalertness, exhaustion, dissociation, or physical pain can arise.
The book explains that recovery is not about reliving the trauma, but about restoring safety in the body step by step. Levine calls this “somatic experiencing.” Small, controllable movements between tension and relaxation help the nervous system to release trapped survival energy.
The core of the book is hopeful: trauma does not have to be a lifelong prison. According to Levine, the body also possesses a natural capacity for recovery, regulation, and resilience.