Our Pursuit of Health, Wealth, and Happiness

We all want happiness, for ourselves and our loved ones. Yet, despite our knowledge of how to live better lives and our various New Year's resolutions, we still struggle to find it. What does the science say about happiness? Who does it best and why? What are the common social roadblocks that get in the way? Does money buy happiness? And, what is the link between happiness, biological health, and longevity?