COULD BE BAD NEWS FOR THE CYNICS AMONG US.
"Psychologists at Edinburgh University found that inherited genes control up to half of the personality traits that keep us happy. The group, working with researchers in Australia, studied nearly 1000 pairs of twins. They built up a picture of each individual's personality by assessing factors such as how sociable and outgoing they were, or how anxious or angry they feel. The group were able to identify evidence of common genes that result in certain personality traits, which in turn predispose people to happiness."