High-Quality Relationships Predict Happiness, Health, and Longevity

Key Quotes

"well frequency has to do with this observation that when we don't keep current with each other with the really important people in our lives that perfectly good relationships can simply wither away from neglect and the quality has a lot to do with what actually is restorative and energizing about relationships which is the sense of relationships being stress reducers the sense of relationships being energizers affirmers of our identity so many different things that we get in a positive way from good quality relationships so it is it's frequency and quality yeah"

Robert Waldinger and Marc Schulz explain that relationship frequency is important because neglecting important people can cause relationships to fade, while quality matters because positive interactions with others can reduce stress, provide energy, and affirm one's identity. These two aspects, frequency and quality, are presented as fundamental components of strong relationships.

"i think many people would immediately go to things like nutrition physical activity sleep for example yet you guys are making the case that sitting above them all potentially the quality of our relationships yeah it's remarkable i mean i think we were surprised when we started to find how important relationships were for our physical health and then when we started to look at other studies and it's the loneliness research that's maybe the most compelling now that you see these incredible links with the amount of time that people spend on the earth the amount of time that they live it's just extraordinary and that relationship is of a similar magnitude to the things that we commonly think about as serious health risks like smoking and obesity"

Waldinger and Schulz highlight that while people often prioritize nutrition, exercise, and sleep for health and longevity, the quality of relationships has a comparable, even greater, impact. They note that loneliness research shows a strong correlation between relationship quality and lifespan, suggesting that relationships are as significant a health factor as smoking or obesity.

"and probably the best hypothesis that we have for which we have the most evidence is a hypothesis about stress that good relationships help us regulate emotion particularly negative emotion so stress is there all day long i mean something upsetting happens to me and i can literally feel my body change go into fight or flight mode and what we know is that when we have someone we can talk to when i can go home and complain to my wife about my day i can literally feel my body calm down and what we know is that loneliness and social isolation are stressors that we evolved to be social animals so if we are too alone what we think happens is that we stay in a low level fight or flight mode the body doesn't return to equilibrium and that means higher levels of circulating stress hormones like cortisol higher levels of chronic inflammation and those things can gradually break down multiple body systems"

The authors propose that a primary mechanism linking relationships to physical health is stress regulation, explaining that good relationships help manage negative emotions. Waldinger and Schulz describe how talking to someone can calm the body's stress response, whereas loneliness acts as a chronic stressor, keeping the body in a heightened state that can lead to inflammation and breakdown of various bodily systems.

"so if we were to take you guys at face value and say okay relationships are important which are the most important there's there's no which about it there's no most important about it they're all important what we do believe is that everybody needs one or two what we call securely attached relationships that at one point in our study we asked our participants who could you call in the middle of the night if you were sick or scared and most people could list several people but some people couldn't list anyone and a few of those people were married and they couldn't list anyone what we believe is that everybody whether you're shy or extroverted everybody needs at least one or two of what we call securely attached relationships where you feel like someone will be there for me if i'm really in trouble yeah"

Waldinger and Schulz clarify that while all relationships are important, the most crucial need is for one or two "securely attached relationships." They illustrate this by referencing a study question where participants identified someone they could call in a crisis, emphasizing that having at least one or two individuals who would be there in times of extreme trouble is essential for everyone, regardless of personality.

"so we talk in the book about this idea about social fitness and social fitness applies to all of your relationships but we need to kind of exercise those relationship muscles to really connect with people to spend time to a lot time that we can you know be together with the people that are important to us and friends are particularly vulnerable i think because of this idea that they're they're folks that we choose and often times we make friends through the activities that we're doing in life so they might be schoolmates from university that uh we're no longer doing the same activities so we have to figure out ways to keep those relationships going whereas relatives i think we often feel that connection around holiday times or family events that there's there are ways in which they keep going but i think the the kind of bigger issue here is that there are so many distractions today for our time that all of us spend a lot of time on screens these days sometimes doing work sometimes being distracted could be by social media or traditional media but we we have to really kind of harvest our time for the things that are most important for us and it's harder and harder to do that with these devices that pull us away from those things that are critical for us"

The authors introduce the concept of "social fitness," which requires actively exercising relationship "muscles" through connection and dedicated time, noting that friendships are especially vulnerable to neglect. Schulz and Waldinger explain that because friends are often made through shared activities, maintaining these bonds requires deliberate effort, especially in the modern era with numerous screen-based distractions that pull attention away from crucial relationships.

"so if you were going to tell someone in one minute what are the key things that you have learned from this study about the human experience what would you say i would say take care of your body like you're going to need it for a hundred years and invest in relationships it's the best payoff you'll get throughout your life love it that was under 15 seconds that was brilliant and mark how would you answer that same question i i i certainly would say similar things to bob but i also would say there's a kind of basic humanity that we all have when we look hard enough at the at folks' lives and really try and understand what their experience is there's a commonality we're human we're all human and that comes through when we look at these lives across time yeah"

When asked for the key takeaways from their study, Robert Waldinger advises to "take care of your body like you're going to need it for a hundred years and invest in relationships," calling it the best payoff in life. Marc Schulz agrees, adding that looking closely at people's lives reveals a fundamental, shared humanity and commonality that emerges when their experiences are truly understood across time.