The route to happiness

In 2005, Professor Sonja Lyubomirsky developed a comprehensive model of sustainable happiness (General Psychology, 2005, 9, 111-131). The result was a theory which proposed that up to 50% of one’s happiness was rooted in a genetically determined set-point, 10% was related to circumstantial factors (nation of residence, demographics, culture, income, etc), and the remaining 40% was determined by intentional activities such as pursuing goals, looking at things optimistically, and being physically active.