Back again with one of the best episodes we've done on the channel. So good that we had to play it once more for you! Today you’ll meet Robert Waldinger, M.D., who leads an extraordinary scientific study on happiness that’s still going strong after eight decades.&nbsp;The study set out to understand human health by what made people&nbsp;thrive.Since 1938, the Harvard Study of Adult Development has tracked two groups of men and their families with the goal of discovering what really makes for a good life. Along the way, thousands of questions were asked, and hundreds of measurements were taken—from brain scans to blood work. Three strong themes emerged from the study:&nbsp;<ul><li>Social connections are&nbsp;really&nbsp;good for you. Loneliness kills.</li><li>It’s the&nbsp;quality&nbsp;of your close relationships that matters.</li><li>Good close relationships don’t just&nbsp;protect your body, they&nbsp;protect your brain.</li></ul>Dr. Waldinger combined those lifelong case studies with modern psychological research in his new book, co-authored with Marc Schulz, Ph.D., “<a href="https://the-good-life-book.com/" rel="noopener noreferrer" target="_blank">The Good Life: Lessons from the World's Longest Scientific Study of Happiness</a>." This discussion gives you real-life tools to hack your happiness. You’ll learn things like:<ul><li>how relationships improve your physical, mental and emotional health. (More than you know!)</li><li>how to evaluate the effect of your relationships on your well-being. (Don’t be dragged down.)</li><li>what social fitness is and how to practice it. (Yes, it’s a flex.)</li><li>ways to enliven and energize your relationships. (Energy totally matters.)</li><li>why casual and work relationships matter more than you think. (A surprisingly big contribution.)</li></ul>You'll Learn:<ul><li>Why loneliness physically harms your body — affecting your brain, immune function, sleep, and pain sensitivity</li><li>The likely mechanism behind why relationships improve health: how a good listener helps regulate your stress response</li><li>What "social fitness" is and why relationships wither from neglect, even without conflict</li><li>The four attachment styles and why knowing yours matters before committing to a relationship</li><li>Why intergenerational friendships may be one of the most underused tools for personal growth and happiness</li></ul>Resources:&nbsp;&nbsp;&nbsp;&nbsp;• Visit&nbsp;<a href="https://metabolismfixbook.com/" rel="noopener noreferrer" target="_blank">https://metabolismfixbook.com/</a>&nbsp;to learn more about JJ Virgin’s new book,&nbsp;The Metabolism Fix, and access the bonus resources she created to go with it.&nbsp;• Get My 2026 Clean Nicotine Roadmap | Enroll for free at&nbsp;<a href="https://daveasprey.com/2026-clean-nicotine-roadmap/" rel="noopener noreferrer" target="_blank">https://daveasprey.com/2026-clean-nicotine-roadmap/</a>&nbsp;&nbsp;&nbsp;• Dave Asprey's Latest News | Go to&nbsp;<a href="https://daveasprey.com/" rel="noopener noreferrer" target="_blank">https://daveasprey.com/</a>&nbsp;to join&nbsp;Inside Track&nbsp;today.&nbsp;&nbsp;&nbsp;&nbsp;• Danger Coffee:&nbsp;<a href="https://dangercoffee.com/discount/davetube" rel="noopener noreferrer" target="_blank">https://dangercoffee.com/discount/davetube</a>&nbsp;• My Daily Supplements:&nbsp;<a href="https://www.shopsuppgradelabs.com/discount/DAVE15" rel="noopener noreferrer" target="_blank">SuppGrade Labs</a>&nbsp;(15% Off)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Favorite Blue Light Blocking Glasses:&nbsp;<a href="https://truedark.com/?coupon-code=DAVEASPREY15&sc-page=shop" rel="noopener noreferrer" target="_blank">TrueDark</a>&nbsp;(15% Off)&nbsp;&nbsp;&nbsp;Timestamps: 00:00 — Introduction & the Study04:43 — What Makes a Good Life08:47 — How Relationships Heal13:44 — Happiness: Nature vs Nurture17:59 — Measuring Happiness23:56 — Life Stages & Happiness35:34 — Social Fitness44:30 — Energizing Relationships56:14 — Attachment & Childhood1:05:04 — Casual Friends & LegacyThank you to our sponsors!&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;- Butcher Box | Go to&nbsp;<a href="http://butcherbox.com/HUMANUPGRADE" rel="noopener noreferrer" target="_blank">ButcherBox.com/HUMANUPGRADE</a>&nbsp;to get $20 off your first box, plus your choice of free ground beef for life, or free chicken thigh&nbsp;- ZenBud | Dave’s Nervous System Biohack. Visit&nbsp;<a href="http://zenbud.health/" rel="noopener noreferrer" target="_blank">zenbud.health</a>&nbsp;and use code DAVE15 at checkout for a discount.&nbsp;- BodyHealth | Visit&nbsp;<a href="http://bodyhealth.com/" rel="noopener noreferrer" target="_blank">BodyHealth.com</a>&nbsp;and use code DAVE20 for 20% off your first purchase.&nbsp;-&nbsp;Puori | Use code DAVE at&nbsp;<a href="http://puori.com/DAVE" rel="noopener noreferrer" target="_blank">puori.com/DAVE</a>&nbsp;to get 32% off your first Puori CP1 Pure Collagen order when you start a subscription. You save more than $26.&nbsp;&nbsp;See Privacy Policy at <a href="https://art19.com/privacy" rel="noopener noreferrer" target="_blank">https://art19.com/privacy</a> and California Privacy Notice at <a href="https://art19.com/privacy#do-not-sell-my-info" rel="noopener noreferrer" target="_blank">https://art19.com/privacy#do-not-sell-my-info</a>.

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