"Why are some people driven to take risks, while others shun danger? Why do some individuals seem to be born optimists, while others are prone to worry and pessimism? There are two basic types of personalities: "sunny" and "rainy." The tendency to see the world optimistically or pessimistically is hardwired into the brain and reflects primal impulses to seek pleasure or avoid danger. When our "fear brain" is too strong, debilitating shyness, depression and anxiety can result. But stunning new research shows that a range of techniques can alter our brain's circuity, allowing even lifelong pessimists to think positively and find happiness. Neuroscientist Elaine Fox explores the connection between optimism and happiness, showing how we can retrain our brains and learn to flourish."--Provided by publisher.