* Age. Age was not a factor, but different factors impacted happiness at different ages.
* Gender. Around 80% of both males and females were ‘fairly satisfied’ with life. Women are twice as vulnerable to depression.
* Wealth. Correlation of 0.67 between national wealth and wellbeing.
* Culture. 10% very happy in Portugal but 40% very happy in Netherlands. Large differences between collectivist and individualist cultures.
* Traits of happy people: optimism, self-esteem, extraversion
* More relationships = happier
* Work satisfaction, flow = happier
* Religion/spiritual commitment = happier (NA and Europe)