Madness Explained Psychosis and Human Nature

Is madness purely a medical condition that can be treated with drugs? Is there a clear dividing line between who is sane and who is insane?
In his groundbreaking work, Madness Explained, leading clinical psychologist Richard Bentall shattered the modern myths that surround psychosis. For this revised edition, he adds new material drawing on the recent advances in molecular genetics, new studies of the role of environment in psychosis, and important discoveries on early symptoms preceding illness, among other important developments in our understanding.