Most people feel increasingly happy starting around age 50.
According to the research, based on a Gallup poll from 2008, generally, life satisfaction is high at age 18 but sinks until about 50. Then, it starts to rise, increasing so steadily that most people feel better about their lives at 85 than they did at 18.
The poll found that by almost any measure, people get happier as they get older, but scientists are not sure why.
“It could be that there are environmental changes, or it could be psychological changes about the way we view the world, or it could even be biological — for example brain chemistry or endocrine changes,” said Arthur A. Stone, the lead author of the study.