Does Psychological Wellbeing actually make a difference, or is it overhyped?

Two independent meta-analyses link dispositional optimism to lower cardiovascular events and all-cause mortality, and a broader synthesis found psychological well-being predicts all-cause mortality independently of the absence of distress — suggesting wellbeing is not just the inverse of mental illness. Weighing the data: Psychological Wellbeing looks well-studied but modest in effect — the evidence is rated strong (72/100), but its estimated impact on longevity is comparatively small (48/100).