Overview
- Above the 2.7 Life Ladder level, each 1% rise in subjective wellbeing is associated with a 0.43% drop in non-communicable disease mortality among adults aged 30 to 70.
- The analysis pooled 2006–2021 data from 123 countries, with an average Life Ladder score of 5.45 and reported values ranging from 2.18 to 7.97.
- Countries exceeding the threshold typically show higher per-capita health spending, stronger social safety nets, and more stable governance, and no upper-limit penalty for happiness was observed.
- Suggested levers to raise wellbeing include expanding obesity prevention, tightening alcohol availability or taxation, improving air quality, and increasing health spending; the association remained after adjusting for multiple factors.
- The authors note limits of self-reported wellbeing and the ecological design, and coverage includes conflicting claims about which nations fall below the threshold.