Claudio Naranjo

Born in Valparaiso, Chile in 1932, Claudio Naranjo trained in medicine at the University of Chile and became part of a mid-century Chilean psychiatric and medical anthropology milieu that treated altered states as a serious object of clinical and cultural research. His early work linked psychiatry, anthropology, and psychopharmacology at a moment when LSD, mescaline, harmaline, and ayahuasca were still being studied in formal scientific settings.

Naranjo's 1967 paper on the psychotropic properties of harmala alkaloids emerged from this context. Written from the Department of Anthropological Medicine at the University of Chile, it compared harmaline and related beta-carbolines with mescaline, drew on reports of Banisteriopsis use in South America, and described human experiments with volunteers. The paper is especially valuable because it places ayahuasca-related chemistry inside a Latin American research setting rather than treating the Amazon only as a distant ethnographic source for European or North American science.

After leaving Chile, Naranjo became associated with the Esalen Institute and the wider human potential movement in California. His later career moved across Gestalt therapy, personality psychology, education, and transpersonal thought, but his psychedelic-era writings remain important evidence for the international networks that connected South American psychiatry, ethnobotany, and the first wave of psychedelic science.