Wèrè and the Ontological Politics of Global Mental Health: Distributed Cognition in Yorùbá Traditional Medicine.
Culture, medicine and psychiatry May 27, 2026 Peer reviewed DOI: 10.1007/s11013-026-09992-1 via PubMed
Summary
Twenty years of ethnographic research with traditional healers in southwestern Nigeria reveals that the Yorùbá term wèrè (meaning mental illness) diagnoses a breakdown in connections across bodily, environmental, ancestral, and spiritual domains, not individual brain dysfunction. Yorùbá language locates cognitive processes in organs beyond the brain—fear in the chest, happiness in the stomach, focus in the liver—and treats rivers, trees, and earth as cognitive beings. Replacing wèrè with the neuropsychiatric term àrún ọpọ̀lọ (brain illness) imposes a Western personalistic ontology onto an ecological-cosmological healing system, constituting epistemic violence. Global mental health must recognize ontological pluralism.
Study at a glance
| Design | ethnographic study |
|---|---|
| Population | traditional healers in southwestern Nigeria |
| Key finding | The Yorùbá concept wèrè reflects an ecological-cosmological ontology fundamentally incommensurable with Western personalistic medicine, and replacing it with neuropsychiatric frameworks constitutes epistemic violence. |
Abstract
Global mental health initiatives increasingly replace indigenous diagnostic categories with neuropsychiatric frameworks, framing this as anti-stigma progress. Drawing on twenty years of ethnographic research with traditional healers in southwestern Nigeria and my position as both researcher and practitioner, this paper examines wèrè-the Yorùbá term for mental illness-to reveal fundamental ontological incommensurability between Western personalistic medicine and Yorùbá ecological-cosmological healing. Through linguistic analysis, micro-phenomenological interviews, and participant observation, I demonstrate that wèrè (wé = weave; ìrè = misery) diagnoses not individual brain dysfunction but unraveling of interconnections across bodily, environmental, ancestral, and spiritual domains. Yorùbá language grammatically locates cognitive processes beyond the brain-fear in chest (ayá), happiness in stomach (inú), focus in liver (ẹ̀dọ̀)-while recognizing environmental agents (rivers, trees, earth) as cognitive beings with agency requiring ritual attention. Therapeutic protocols operationalize "totalness" (gbogbo àyè), addressing not only persons but ecological-cosmological fields where disequilibrium occurs. Replacing wèrè with àrún ọpọ̀lọ (brain illness) constitutes epistemic violence, imposing personalistic ontology where ecological-cosmological ontology operates. Global mental health must recognize ontological pluralism: multiple valid healing sciences operating in incommensurable realities.