What is *The Longevity Project* by Howard S. Friedman about?

*The Longevity Project* analyzes an 80-year Stanford study tracking 1,500 individuals to identify traits linked to long life. Contrary to myths, it reveals conscientiousness, strong social networks, and purposeful careers—not just diet or marriage—are critical predictors. Authors Howard Friedman and Leslie Martin emphasize persistence, prudence, and community engagement as keys to longevity.

Who should read *The Longevity Project*?

This book suits health enthusiasts, psychology/medicine students, and skeptics of generic wellness advice. It’s ideal for readers seeking data-driven insights into lifelong habits, those reevaluating life choices, or professionals exploring lifestyle’s impact on aging. Friedman and Martin blend rigorous research with actionable strategies.

Is *The Longevity Project* worth reading?

Yes—it’s a seminal work debunking longevity myths using decades of empirical data. The book offers actionable frameworks (e.g., conscientiousness cultivation, social bonding) and self-assessment tools. Its focus on personality over quick fixes makes it a standout in health literature.

What are the main factors for longevity in *The Longevity Project*?

Three pillars emerge: **conscientiousness** (planning, perseverance), **social integration** (strong community ties), and **purposeful work**. Unlike fleeting health trends, these traits reduce risks incrementally. For example, conscientious individuals avoid risky behaviors and build stable lifestyles, while social bonds buffer stress.

How does conscientiousness affect lifespan according to *The Longevity Project*?

Conscientious people live longer due to prudent habits and risk avoidance. They’re less likely to smoke, drink excessively, or engage in dangerous activities. The book ties this trait to organizational skills and long-term goal-setting, which foster stability—a buffer against life’s stressors.

What does *The Longevity Project* say about marriage and longevity?

Married men live significantly longer, but benefits for women are minimal. Divorced men face higher mortality risks, while single women thrive equally. The study attributes this to men’s reliance on spouses for emotional support and healthier habits.

How do social connections influence longevity in *The Longevity Project*?

Active community engagement and close friendships amplify lifespan, especially for women. Socially integrated individuals experience lower stress and better mental health. The authors caution against isolation, linking it to higher disease rates and shorter lifespans.

What role does career success play in longevity per *The Longevity Project*?

High-achieving men live 5+ years longer than peers. Meaningful work—not stress—promotes longevity. Workplace conflicts (not job demands) harm health. The book advocates for purposeful careers that align with personal values and foster growth.

Longevity Project

Surprising Discoveries for Health and Long Life from the Landmark Eight-Decade Study

Howard S. Friedman and Leslie R. Martin

3.66(922 Reviews)

Overview of Longevity Project

Forget what you think about living longer. The Longevity Project reveals an 80-year study's shocking truth: hard workers outlive the relaxed, and marriage doesn't guarantee longevity. Dr. Andrew Weil calls these counterintuitive findings "a remarkable achievement" reshaping health advice forever.

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Chapter 1

Beyond Years: Unlocking the Science of Longevity

What if the health advice you've been following for years is actually wrong? In 1921, Stanford psychologist Lewis Terman began tracking 1,500 gifted children born around 1910, creating what would become one of the most comprehensive and revealing longitudinal studies in history. Eight decades later, researchers Howard Friedman and Leslie Martin discovered something remarkable: the secrets to longevity weren't found in broccoli consumption or jogging regimens, but in surprising constellations of personality traits, social connections, and life patterns. The Longevity Project has become a cornerstone text in health psychology, praised by Malcolm Gladwell and featured in The New York Times. Its findings challenge conventional wisdom about what makes for a long, healthy life. The study's participants included notable figures like Jess Oppenheimer (creator of "I Love Lucy") and Shelley Smith (Life magazine writer who survived a Japanese POW camp), ordinary people whose extraordinary lifespans revealed patterns that continue to reshape our understanding of health and longevity.

Chapter 2

The Conscientious Advantage: Prudence Pays Off

When Dr. Friedman and Dr. Martin began analyzing the Terman data, they expected to find that happy, cheerful people lived longest. Instead, they discovered something unexpected: the strongest personality predictor of longevity was conscientiousness-the tendency to be prudent, persistent, and well-organized. Children rated high in conscientiousness by their parents and teachers in 1922 were significantly more likely to live into old age, often outliving their less conscientious peers by a decade or more. Take Patricia, one of the longest-lived Terman participants. As a child, she was described as dependable and thorough. Throughout her life, she reported enjoying planning work in detail, driving herself steadily, and pursuing goals with persistence. Her conscientious approach to life manifested not just in career success but in careful health decisions and stable relationships that supported her longevity. This finding has been replicated across numerous studies. A meta-analysis of twenty studies with about 9,000 participants confirmed that conscientious individuals were less likely to die at any given age. The connection between conscientiousness and longevity appears remarkably robust across different populations and time periods. Why does conscientiousness protect health? The researchers identified three primary mechanisms. First, conscientious people make healthier choices-they're less likely to smoke, abuse alcohol, or engage in risky behaviors. Second, they appear biologically predisposed to better health, with different neurochemistry including serotonin levels that affect impulsivity and regulate bodily processes. Third and perhaps most fascinating, conscientious individuals create healthier environments for themselves-they find their way to better marriages, friendships, and work situations that support their well-being over decades. The good news is that conscientiousness isn't fixed at birth. People can and do become more conscientious over time, especially when taking on responsibilities that require dependability. James, initially described as impulsive and present-focused as a youth, gradually developed conscientiousness as he took on adult responsibilities. Over a decade, he transformed from being in the bottom quartile to the top quartile on conscientiousness measures-and lived to old age as a result.

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Chapter 3

The Sociability Paradox: When Being Popular Backfires

American culture celebrates extroversion and sociability, but the Terman study revealed a surprising truth: highly sociable children did not necessarily live longer lives. In fact, being the life of the party sometimes shortened lifespans. Dr. Terman discovered stark differences between subjects who became scientists versus those who became businessmen or lawyers. Scientists were notably less sociable-shyer as children and less interested in social networks as adults. Yet these less sociable scientists outlived their more sociable counterparts in business and law. While the sociable children grew up to have better social relations, they also tended toward more tumultuous careers and health-damaging behaviors. The research team found that sociable children grew up to drink and smoke more throughout adulthood. Unlike conscientious children who developed healthier behaviors, sociable individuals were more susceptible to social pressures around drinking and smoking. They also more frequently found themselves in environments where such activities were normalized. Scientific evidence suggests outgoing, extroverted people may find the rewards of alcohol or tobacco inherently more appealing. However, a specific type of sociability-emotional connectedness with others-did show health benefits. People high in "affective communication" excel at expressing feelings through nonverbal cues like body movement, touch, and vocal expression. These emotionally expressive individuals often enjoyed better health, provided they channeled their social skills toward healthy relationships rather than risky social circles. The key insight isn't that being sociable is bad, but rather that the quality and nature of social connections matter more than quantity. Many introverted children in the study developed stable jobs and steady friendships that proved equally valuable for health and longevity as the wider social networks of extroverts. What ultimately matters isn't being the most popular person in the room, but cultivating meaningful connections that support healthy choices.

Chapter 4

The Happiness Myth: Why Cheerful Children Often Die Young

Perhaps the most counterintuitive finding from the Longevity Project was that cheerful, optimistic children were less likely to live to old age than their more serious counterparts. The magnitude of this link between cheerfulness and mortality risk was comparable to established risk factors like elevated blood pressure and cholesterol. The cheerful Terman children were described by parents and teachers as extraordinarily optimistic, never seeing the dark side, and having excellent senses of humor. Paul exemplified this-fun to be around, energetic, sociable, and rarely ill. Yet these cheerful individuals often engaged in behaviors that undermined their health over the long term. As the researchers investigated why serious Emmas outlived cheery Pauls, they found several patterns. The cheerful Terman participants were more likely to die young, with slightly higher rates of death from accidents, suicide, or homicide. They were typically carefree, "the sort who never worry over possible misfortunes." The cheerful children grew up to drink more alcohol, smoke more cigarettes, and engage in riskier hobbies. Many displayed a happy-go-lucky disregard for their health. This doesn't mean happiness is bad for health-rather, it suggests that artificial attempts to boost happiness through prescribed activities rarely stick long-term. The Terman participants who lived long, happy lives never received formal instruction about happiness-they traveled pathways of living that naturally made them both happy and healthy. Interestingly, a certain type of worrying proved beneficial, especially for men. Neurotic, worrying men who lost their wives had half the mortality risk of non-neurotic widowers. This unexpected finding suggests that worrying compensated for lost social ties, as these men were more willing to take care of their health after their wives were gone. James, somewhat moody and anxious, lived well past his wife's death, his nagging thoughts keeping him involved in his own health maintenance. The evidence is clear: "Put a smile on your face, and lighten up-cheer up and live long" is another dead-end health myth. Happiness is best understood as an outcome of healthy living rather than its cause.

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Chapter 5

The Catastrophic Mind: When Negative Thoughts Turn Deadly

While moderate worrying sometimes benefited health, catastrophizing-the tendency to see impending doom everywhere-significantly increased mortality risk. Catastrophizers blame themselves excessively, see difficulties as permanent, and overgeneralize problems to their entire life. Karen exemplified this pattern, being extraordinarily sensitive to disapproval and having persistent fears even in childhood. The researchers analyzed written responses about flaws and disappointments to evaluate participants' tendency toward catastrophizing. The results were clear: catastrophizers died sooner, with the difference especially pronounced among men. Analysis of death certificates revealed that catastrophizers were much more likely to die from accidents or violence, but only slightly more likely to die from diseases like cancer or cardiovascular conditions. People who believe that one significant problem signals many more bad things to come put themselves on risky paths, especially regarding violent early death. The tragic case of Douglas Kelley, a Terman participant who became a prominent psychiatrist, illustrates this pattern. After serving at Nuremberg where he psychologically evaluated Nazi leaders including Hermann Goering, Kelley's life took a dark turn. Despite outward success, on New Year's Day 1958, at just forty-five, Kelley killed himself by swallowing cyanide-the same method Goering had used. Though jovial in demeanor, Kelley's close exposure to human evil likely shattered his sense of order and meaning, transforming his worldview into something catastrophic. In contrast, when Dr. Shneidman interviewed Terman men in their seventies, he found that these long-lived individuals primarily discussed occupation, family, and health-and remarkably, not one man ever mentioned his own inevitable death. While they occasionally referenced friends' deaths and discussed health maintenance, their focus remained firmly on living rather than dying. The good news is that catastrophic thinking can be changed through cognitive therapy techniques like "thought stopping" (interrupting negative thoughts) and "thought replacement" (substituting positive alternatives). While simple in concept, changing habitual thought patterns requires patience and persistence-but catastrophizers can learn to become more realistic.

Chapter 6

Early Experiences: The Foundation of Longevity

The Terman study revealed surprising insights about how early childhood experiences affect health and longevity. While severe early health problems can impact lifespan, most common variations in early childhood health showed surprisingly little association with longevity. For instance, despite heated debates about breast-feeding, it made little difference to long-term health outcomes among the Terman participants. More significant was the timing of formal education. The researchers discovered that children who started school at age five (rather than the traditional age of six) tended to have more difficulties throughout life, including poorer adjustment and higher mortality risk. The real issue wasn't precocity itself but the loss of unstructured playtime crucial for healthy development. Philip, who entered school at five, exemplified this problem-despite his intelligence and energy, he showed uneven academic performance, seeking attention through behavior and struggling with focus. Surprisingly, education level itself wasn't a strong predictor of longevity among the equally intelligent Terman participants. While better-educated subjects tended to live slightly longer, this relationship was weaker than other personal and social factors. The researchers found that persistence, parental expectations, and supportive social environments were more important than education alone in determining health outcomes and longevity. Perhaps the most striking finding regarding childhood was the impact of parental divorce. While parental death had no measurable impact on lifespan, parental divorce emerged as the single strongest social predictor of early death. Children from divorced families died almost five years earlier on average than those from intact families. This wasn't primarily due to economic hardship but rather to the cascade of unhealthy patterns that often followed family breakups-earlier termination of education, increased smoking and drinking, relationship difficulties, and reduced community involvement. However, many children of divorce, like Patricia and James, went on to live long lives. Their fulfilling marriages played a crucial role in promoting their longevity, as did their sense of satisfaction and accomplishment by midlife. This sense of satisfaction predicted longer lifespans only for those whose parents had divorced-for those from intact families, satisfaction had no effect on mortality risk. This protective strength emerged specifically in response to the challenge of parental divorce, suggesting that overcoming adversity truly can make some individuals stronger.

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Chapter 7

The Activity Equation: Beyond Exercise Regimens

The relationship between physical activity and longevity proved more nuanced than conventional wisdom suggests. The Terman study revealed remarkable consistency in physical activity levels throughout life. Parents' ratings of their children's energy and activity preferences at age eleven predicted hobby choices decades later. However, middle-age activity proved most crucial for longevity, rather than childhood athleticism. Being a "jock" in youth provided no longevity advantage if activity declined significantly with age. Conversely, sedentary children who became active adults often achieved similar lifespans as those consistently active throughout life. The encouraging finding was that previously inactive individuals who increased their physical activity levels could catch up to or even surpass the health outcomes of their naturally athletic peers. Ancel Keys, who lived to 100 and became famous for his work on diet and heart disease, maintained lifelong activity patterns not through intense exercise regimens but through regular physical activity integrated into his daily life. The successful Terman participants didn't force themselves to exercise; they developed sustainable patterns that naturally got them up and moving. The researchers highlight a rarely discussed paradox about exercise: the time investment versus longevity gain. Someone jogging an hour daily for 40 years spends roughly 14,400 hours exercising-equivalent to about 2.5 years of waking life. Yet any intervention increasing average lifespan by more than 2.5 years would be considered remarkably effective, suggesting little net time gain for dedicated exercisers. The key insight isn't that exercise is unimportant, but rather that sustainable activity integrated into daily life matters more than rigid exercise regimens. The Terman participants stayed healthy without modern exercise culture-jogging shoes, treadmills and marathons were largely unknown to them. Instead, they found physical activities they genuinely enjoyed and could maintain long-term-whether walking with friends, gardening, or team sports.

Chapter 8

Marriage Matters: The Complex Relationship Between Relationships and Longevity

While married people statistically live longer than unmarried people, the popular advice to "get married to live longer" is misleading. The Terman study revealed that the benefits primarily apply to men, not women, and depend entirely on the quality of the relationship. By examining different marital pathways, the researchers identified four distinct groups: the "steadily married" (still with first spouse), the "remarried" (divorced but married again), the "divorced" (unmarried after divorce), and the "steadily single" (never married). This conceptual breakthrough revealed that different marital histories had different health implications. For men, the findings confirmed that divorced men faced much higher mortality risk than married men-fewer than a third reached old age. However, the fascinating comparison was between steadily married men and remarried men. The remarried men lived longer than divorced men but significantly shorter lives than steadily married men. This occurred despite remarried men having wives to help with emergencies, encourage healthy habits, and provide bedside care during illness. Steadily single men outlived both remarried and divorced men but didn't live as long as steadily married men. Women showed surprising and unexpected results. Like men, steadily married women lived somewhat longer than those who divorced and remarried. However, women who divorced and stayed single fared remarkably well-they lived nearly as long as steadily married women, unlike their divorced male counterparts who suffered terribly. Being divorced was far less harmful to women's health than to men's. Steadily single women fell in between-they didn't live as long as steadily married women but outlived those who married, divorced, and remarried. Looking at the full life histories revealed broader patterns. Children who grew up to be steadily married were less likely to have faced parental divorce. More importantly, childhood personality directly linked to marital success-those who became consistently married had been more conscientious as children. Using Dr. Terman's innovative marital happiness scale, the researchers discovered something unexpected: the husband's marital happiness was the crucial factor for predicting later health-for both men and women. A woman whose husband was unhappy in 1940 was likely to be unhealthy and unhappy as she aged, regardless of her own happiness at the time. The conclusion: "a happy man means a healthy clan."

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Chapter 9

Career Success: When Hard Work Extends Life

Contrary to popular belief that stress shortens lives, the Terman study found that successful individuals with demanding careers often lived longer than their less accomplished peers. The results were unambiguous: the most successful men lived approximately five years longer than the least successful ones. A clear dose-response relationship emerged-moderately successful men lived longer than less successful ones, but not as long as the most successful. Norris Bradbury, a Terman participant who became an atomic physicist working on the Manhattan Project and later directed Los Alamos National Laboratory, exemplifies how high-pressure careers don't necessarily lead to early death. Despite overseeing the nation's nuclear arsenal during intense Cold War tensions-arguably one of the most stressful positions imaginable-Bradbury lived to 88, was honored with the Enrico Fermi Award, and enjoyed a 64-year marriage. While conventional wisdom suggests the wealthy live longer due to better healthcare and safer environments, the Terman study revealed something deeper. Even among this largely advantaged, middle-class sample, the highly successful significantly outlived their less successful peers. Conscientiousness played a role but didn't explain everything-career success independently predicted longevity. The truly damaging workplace stress stems from interpersonal conflicts rather than work demands themselves. Poor relationships with bosses or colleagues create health problems, especially when responsibilities require cooperation but resources or leadership skills are lacking. Conversely, those with power and influence tend to remain healthy despite demanding careers. When examining the 720 Terman participants still alive in the 1980s (most over seventy), the researchers found that those who remained productive, motivated and accomplishment-oriented lived significantly longer than their more relaxed peers. This productivity in old age-whether through paid work, education, or social contributions-proved more important for longevity than social relationships or happiness. Contrary to what skeptics might assume, productive, hardworking people weren't stressed and miserable. They were actually happier, healthier, and more socially connected than their less productive counterparts. The Terman participants who worked harder in their jobs not only lived longer but were happier too.

Chapter 10

Social Connections: The True Fountain of Youth

The Terman study revealed that "social support" is a confusing catchall term that can refer to network size, feelings of being cared for, or the support derived from helping others. By examining different aspects of social connection, the researchers discovered which elements truly matter for longevity. Contrary to their prediction, feeling loved and cared for didn't significantly impact longevity. Instead, two factors proved most important: having a large social network and helping others. Those who regularly contacted friends and relatives, and especially those like Barbara who both maintained large networks and actively helped others, enjoyed the greatest longevity benefits. The researchers found that the hands-on aspects of social connection-staying in touch with family, doing things with friends, and helping others-mattered far more than merely feeling supported. Despite popular belief that pets provide health benefits, the researchers found no association between playing with pets and longer life. Even when analyzing only socially isolated individuals, for whom pets might theoretically fill a social gap, pet interaction showed no longevity benefit. The researchers concluded that while pets may bring joy, they don't provide the social enrichment crucial for long life. Religious involvement significantly predicted longevity for women but not men. The longest-lived religious women were characterized by being outgoing yet concerned, with good social ties and helpful behaviors. However, it wasn't religious involvement itself that promoted longevity, but rather the social characteristics and behaviors associated with religious participation. The researchers clarify a common misconception about life expectancy increases. While average American lifespan rose from about 47 years (for those born around 1910) to 79 years recently, this gain primarily came from reduced infant and childhood mortality-not from extending adult lifespans. A sixty-year-old white American male's life expectancy only increased by about 4-5 years over the last half-century. This distinction highlights the significance of social support: Terman subjects with healthy social networks were much more likely to reach their 70s-90s, while equally healthy and intelligent participants without such networks often died before 65.

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Chapter 11

Individual Pathways to Long Life

The Longevity Project's most important conclusion is that there is no single formula for long life. Instead, different individuals find different viable pathways based on their unique personalities, social circumstances, and life experiences. John, the shy scientist, found a viable path to long life despite never marrying. He maintained a small but stable group of friends, primarily through his work, where his attention to detail, persistence, and love of learning became strengths. Emma never married but pursued her career passionately, traveled widely, and maintained close friendships with siblings and others. Her reports to Terman reflected a spirited, serious woman taking advantage of opportunities, not someone feeling incomplete. The qualities cultivated by long-lived participants reflected active pursuit of goals, deep life satisfaction, and strong accomplishment. Not giddy happiness, but purposeful living: large social networks, engaging physical activities, community involvement, thriving careers, and nurturing relationships. Those involved with others in consequential lives improved their health as an unanticipated bonus. The 1,528 Terman participants, all intelligent with good starts in life, had varying degrees of success and longevity. It wasn't cheerfulness, popularity, or stress avoidance that determined longevity. Rather, those who lived longest followed complex patterns of persistence, prudence, hard work, and close involvement with friends and communities. They found meaningful, interesting life paths and returned to these healthy paths when pushed off course. Perhaps most encouragingly, the study shows that little is fixed in childhood; those who maintained or found their way to healthy paths thrived in life's second half. Many Terman children began on healthy trajectories-physically active and socially well-adjusted-but by age sixty, most had lost vigor. Those who lived longest either maintained activity throughout life or increased it after starting less active. Similarly with conscientiousness-those conscientious as children who remained persistent and prudent lived longest. However, initially unconscientious individuals who developed greater prudence and persistence through positions requiring maturity could substantially close the gap. The Terman study ultimately reveals that longevity isn't about following rigid prescriptions or health checklists. It's about finding your own sustainable path that naturally incorporates the elements that promote long life: conscientiousness, meaningful work, strong social connections, and purposeful engagement with life. Though some consequential lives are cut short and some long lives lack accomplishment, embracing these lessons increases the odds of both a meaningful and long life.

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Key Themes in Longevity Project

conscientiousness and health
longitudinal aging studies
personality trait predictors
social connection quality
behavioral longevity patterns

Quotes from Longevity Project

Being the life of the party sometimes shortened lifespans.
The cheerful children grew up to drink more alcohol, smoke more cigarettes, and engage in riskier hobbies.
Happiness is best understood as an outcome of healthy living rather than its cause.
The strongest personality predictor of longevity was conscientiousness.
What ultimately matters isn't being the most popular person in the room, but cultivating meaningful connections.

Characters in Longevity Project

Howard S. FriedmanLead researcher and co-author of the study
Leslie R. MartinLead researcher and co-author of the study
PatriciaLong-lived participant used as a case study

About the Author

Howard S. Friedman and Leslie R. Martin, authors of The Longevity Project: Surprising Discoveries for Health and Long Life from the Landmark Eight-Decade Study, are renowned psychologists and researchers specializing in health, personality, and lifespan development.

Friedman, a Distinguished Professor at the University of California, Riverside, and Martin, a Professor of Psychology at La Sierra University, leverage their decades of collaborative research—including over 150 peer-reviewed studies—to explore how psychosocial factors shape longevity. Their work builds on Lewis Terman’s historic "Genetic Studies of Genius," extending it into a groundbreaking analysis of lifelong habits, relationships, and career paths.

Friedman’s prior book, The Self-Healing Personality, established his authority on resilience, while their joint research has been widely cited in both academic and mainstream circles. The Wall Street Journal praised The Longevity Project as "an absorbing and invaluable read," highlighting its evidence-driven insights into health myths and societal trends. The book distills findings from one of psychology’s most extensive longitudinal studies, tracking participants across 80 years to reveal unexpected predictors of long life.

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@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

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Chapter 11

Longevity Project

OverviewOverview of Longevity Project

One book. Many ways to hear it.

Beyond Years: Unlocking the Science of Longevity

The Conscientious Advantage: Prudence Pays Off

See every word as you hear it

The Sociability Paradox: When Being Popular Backfires

The Happiness Myth: Why Cheerful Children Often Die Young

Get more out of Longevity Project

The Catastrophic Mind: When Negative Thoughts Turn Deadly

Early Experiences: The Foundation of Longevity

See every word as you hear it

The Activity Equation: Beyond Exercise Regimens

Marriage Matters: The Complex Relationship Between Relationships and Longevity

Get more out of Longevity Project

Career Success: When Hard Work Extends Life

Social Connections: The True Fountain of Youth

See every word as you hear it

Individual Pathways to Long Life

You made it to the end of Longevity Project

Key Themes in Longevity Project

Quotes from Longevity Project

Characters in Longevity Project

About the Author

Download Summary of Longevity Project

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FAQs About This Book

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Is The Longevity Project worth reading?

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Discover more

1,000,000+ curious minds.

1,000,000+ curious minds.

One book. Many ways to hear it.

Beyond Years: Unlocking the Science of Longevity

The Conscientious Advantage: Prudence Pays Off

See every word as you hear it

The Sociability Paradox: When Being Popular Backfires

The Happiness Myth: Why Cheerful Children Often Die Young

Get more out of Longevity Project

The Catastrophic Mind: When Negative Thoughts Turn Deadly

Early Experiences: The Foundation of Longevity

See every word as you hear it

The Activity Equation: Beyond Exercise Regimens

Marriage Matters: The Complex Relationship Between Relationships and Longevity

Get more out of Longevity Project

Career Success: When Hard Work Extends Life

Social Connections: The True Fountain of Youth

See every word as you hear it

Individual Pathways to Long Life

You made it to the end of Longevity Project

Users also liked

Discover more

Overview of Longevity Project