In this programme we are delighted to have as our guest Elaine Fox, who is professor of cognitive psychology at the university of Essex. Elaine has just published Rainy Brain, Sunny Brain: The New Science of Optimism and Pessimism, which explores such fascinating questions as: how does having an optimistic or a pessimistic outlook affect the successes and failures in our lives? How do small biases to look on the bright or the dark side become confirmed, even ingrained? What part do genes play in all this?