A Happiness Gene

In this clip, a geneticist, Gene Hama, explains that people are born with a long or short gene that acts like a natural version of Prozac and affects their happiness.


Hama found that people with a long form of the gene were happier overall whereas people with the short gene were more neurotic. What does Hama explain about genes at the end of the clip? How do Hamas findings demonstrate the hedonic treadmill theory?