Psychiatry is caught up in a number of philosophical errors. One is reductionism, as psychiatry tends to seek underlying biological causes for mental disorders. The other is dualism, as it thinks of mental disorders as either caused by our brains or caused by our minds. Both these errors are a result of seeing the world as made up of a hierarchy of things. Instead, if psychiatry saw the world as fundamentally made up of processes, dynamically interacting with each other, a much more nuanced understanding of mental disorders would become available to it, argues Elly Vintiadis.