Scientists looked at 123 countries. They found that happier nations have fewer early deaths from illnesses like heart disease, cancer, diabetes, and lung problems.
The study was printed on October 20 in the journal Frontiers in Medicine.
Researchers used a scale called the Life Ladder. Zero means the worst life you can imagine. Ten means the best.
When a country’s score goes over 2.7, deaths from long-lasting sicknesses drop for adults aged 30 to 70.
Scores in the study went from 2.18 to 7.97. The world average was 5.45. The United States usually scores about 6.7.
Each 1% rise in national well-being was linked to a 0.43% fall in deaths from chronic disease.
Happy people often do better at work, build strong relationships, and live longer lives.
Experts say happiness is not just about smiling. It can act like a public health tool.
Genes, habits, and the environment also affect health, so no one should feel guilty if they are ill.
Measuring a whole country’s mood is hard. Some poor or war-torn nations lacked full data.
The death numbers stopped at age 70, so older ages were not included.
Researchers say true well-being is more than short thrills. It includes life satisfaction, strong social ties, clear goals, and a sense of purpose.