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“Evolution in the cognitive niche has endowed our species with remarkable abilities such as language, abstract reasoning, and sophisticated mentalizing. These species-typical innovations have been accompanied by rapid changes in brain structure and functionality. While adaptations such as language are hugely beneficial, they are also likley to carry some costs. A number of authors have argued that vulnerability to psychosis is one of those costs -the price our species pays for its unique set of cognitive skills. From this perspective, there are no individual fitness benefits to psychosis proneness; vulnerability to schizophrenia and other psychoses is a general byproduct of our evolved design, and unfortunate combinations of genetic and environmental factors determine the onset of a full-fledged disorder in some individuals.” — Marco del Giudice