
The Michael Shermer Show 329. Marc Schulz — The Good Life: Lessons from the World's Longest Scientific Study of Happiness
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Mar 4, 2023 AI Snips
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Relationships Predict Long-Term Health
- Relationship quality at age 50 predicted healthier aging in the 80s more than cholesterol or childhood advantage.
- Loneliness raises physical health risk comparable to smoking and obesity, making social ties a major determinant of longevity.
Zero To One Friend Yields The Biggest Gain
- One close dependable person makes the biggest difference; moving from zero to one or two friends yields the largest benefit.
- Different friends provide varied support (calming, challenging, emergency help), so multiple ties are useful if available.
Set Points Exist But Personality Still Changes
- Personality has genetic set-points but still shifts across the lifespan; about 50% of happiness may be genetic while behavior influences the rest.
- Neuroticism often decreases with age, contributing to a normative rise in happiness from middle to late life.

