This book looks at the question psychologists have been asking for over a hundred years - why are we the way we are? It starts with you, your mind and brain, broadening out to look at your friends and other relationships, then finally on to crowds, mobs and religion. It explores the latest research relevant to crime, schooling, sport, politics, shopping and health, and what happens when the mind goes wrong, including depression, anxiety, schizophrenia, and more unusual conditions.