The pursuit of happiness is not uniquely American either—in a study of more than 10,000 participants from 48 countries, psychologists Ed Diener of the University of Illinois at Urbana-Champaign and Shigehiro Oishi of the University of Virginia discovered that people from every corner of the globe rated happiness as being more important than other highly desirable personal outcomes, such as having meaning in life, becoming rich, and getting into heaven.
The fever for happiness is spurred on, in part, by a growing body of research suggesting that happiness does not just feel good but is good for you—it's been linked to all sorts of benefits, from higher earnings and better immune-system functioning to boosts in creativity.
Most people accept that true happiness is more than a jumble of intensely positive feelings—it's probably better described as a sense of "peace" or "contentedness." Regardless of how it's defined, happiness is partly emotional—and therefore tethered to the truth that each individual's feelings have a natural set point, like a thermostat, which genetic baggage and personality play a role in establishing. Yes, positive events give you a boost, but before long you swing back toward your natural set point