We humans behave in mysterious ways. We fight for seemingly no reason, eat too much, make our selves and others unhappy, and behave in all sorts of self-defeating ways. Why do we do what we do? And how can we change our behavior for the better? James D. Baird, author of the bestselling "Happiness Genes," has researched the answers to these questions. In "Behavioral Genes," he brings state-of-the-art science to our fingertips, giving us the knowledge...