How are we to make sense of madness and psychosis? For most of us the words conjure up images from television and newspapers of seemingly random, meaningless violence. It is something to be feared, something to be left to the experts, psychiatrists and psychologists. But is madness best thought of as a medical condition? Psychiatrists and the drug industry maintain that psychoses are brain disorders amenable to treatment with drugs, but is this actually so? There is no convincing evidence that the brain is disordered in psychosis, yet governments across the world are investing huge sums of...