Prune One Default. Plant One New Friendship.

The Edit That Gives You Something Back

The Research, In Person

Last weekend, I had the privilege of standing in a room at SMU surrounded by friends whose ages span decades. It was a beautiful afternoon tea, and our table was, to put it plainly, the most fun in the room! Many of the people sitting together had never met before. By the end of the afternoon, they were exchanging phone numbers and comparing vacation ideas.

As I drove home, I kept thinking about that table. You did not need the research. That table was the whole argument.

You do not have to engineer intergenerational connection. You only have to stop filtering it out.

The research will explain why it matters. But if you want a simpler reason, it is this. The table with the widest age range was the one nobody wanted to leave.

The Spring Edit

Every other prune in The Spring Edit is a removal. Something to stop, something to subtract, or something to clear.

This one is different.

This week's social edit asks you to do two things. First, prune the default that may have quietly narrowed your social world. Then plant something new. One new friendship. One intergenerational connection. One investment in a relationship outside the generational band you may have been living inside.

The pruning and the planting happen in the same week, and in the same gesture. When the default is removed, space opens. And that is where something new can grow. 

Spring does both. This week, so do you.

The Portfolio No One Audits

Social capital, like financial capital, can be diversified or concentrated. Most high-performing adults have never audited theirs.

The default in high-achieving adult social life is concentration. The same generation. The same professional tier. The same cultural references, life stage, and risk profile. The relationships feel rich because the shared context is deep. But depth within a narrow band is not the same as range. In a social portfolio, just as in a financial one, concentration carries risk.

This paper explores why generational diversification matters for longevity. It looks at what the research reveals about intergenerational connection as a biological and cognitive asset. It also explains why planting a new friendship across generational lines may be one of the highest-yield social investments available. 

What Generational Concentration Costs

When most of the people in your life share the same generational lens, a few subtle things happen. Assumptions about aging tend to go unchallenged because everyone is moving through similar experiences at roughly the same time. What feels possible, difficult, or normal begins to synchronize across the group.

There is a cognitive reason for this. The brain builds its expectations about the future from the evidence it sees most often. If the social environment contains only one generation, the brain is drawing from a narrow set of examples.

Put simply, who you spend time with shapes what you believe is still possible.

Research Note: A 2019 study published in The Journals of Gerontology found that adults with high levels of intergenerational contact reported significantly more positive attitudes toward their own aging, higher subjective well-being, and lower levels of age-related anxiety than those whose social networks were primarily same-generation.

You are not just investing in relationships. You are investing in models. At a multigenerational table, everyone becomes both an example and a glimpse of what comes next. 

The Longevity Research on Social Diversity

The longevity literature on social connection is clear and consistent. Social isolation carries a mortality risk comparable to smoking fifteen cigarettes a day.

But an important nuance is often overlooked. The quality and diversity of social relationships matter as much as the quantity.

Brigham Young University researcher Julianne Holt-Lunstad, whose work helped establish social isolation as a major mortality risk factor, has noted that the protective effects of connection are strongest when relationships provide novelty, perspective, and cognitive engagement. Relationships that simply reinforce existing worldviews offer comfort, but less cognitive protection.

Intergenerational relationships naturally provide the perspective that same-generation relationships cannot. The worldview, values, cultural references, and time horizon of someone twenty or thirty years older or younger are meaningfully different. Engaging across that difference requires cognitive flexibility in precisely the way that helps protect the brain.

Research Note: Research on cognitive reserve, the brain's resilience against age-related decline, consistently identifies social and intellectual novelty as primary contributors. Intergenerational relationships, which combine social engagement with genuine perspective diversity, are a powerful source of cognitive reserve.

What Younger Friendships Plant

Relationships with people meaningfully younger than you offer assets that same-generation friendships cannot. Cultural novelty interrupts the echo chamber of shared experience. Their energy recalibrates your own sense of vitality and possibility. Their view of the future is not filtered through accumulated loss, risk aversion, or generational fatigue.

There is also the dimension of generatively, which is often undervalued as a longevity asset. Erik Erikson identified generativity, the need to invest in the next generation, as the central psychological task of midlife and beyond. Adults who maintain generative relationships through mentoring, teaching, or genuine friendship with younger people report higher levels of purpose, life satisfaction, and well-being. Generativity is not simply altruism. It is a biological need, and meeting it is protective.

A younger friend also shifts your sense of the future in a way that is difficult to measure but easy to feel. Their horizon quietly becomes part of your own.

What Older Friendships Plant

Relationships with people meaningfully older than you offer something equally valuable and often overlooked: a lived example of what lies ahead.

Not the cultural narrative of decline that dominates media portrayals of aging, but real evidence of continued capacity, adaptation, meaning, and vitality.

Psychologist Laura Carstensen's socioemotional selectivity theory, developed over decades at Stanford, shows that older adults with diverse social networks, including relationships with younger people, demonstrate stronger emotional regulation, higher life satisfaction, and more adaptive responses to challenge than those whose networks are narrow or shrinking.

An older friend plants perspective. The understanding that what feels urgent at fifty will look different at seventy. That the years ahead hold their own richness. That the accumulation of decades is an asset. These lessons are difficult to learn from data. They are easier to recognize when a friend is living them. 

Research Note: A longitudinal study from the Rush Memory and Aging Project found that older adults with a strong sense of purpose, often supported by intergenerational relationships and mentoring roles, had a 2.4 times lower risk of Alzheimer's disease than those with low purpose scores.

The Prune and the Plant

This edit is not about removing friends. It is about removing the default. The quiet filter that routes social invitations, introductions, and investments of time and attention toward people in your own generational cohort.

Remove it for this week. Not permanently. Not dramatically. Just loosen it enough this week to allow a new connection form outside the band.

Then plant.

• Invite someone meaningfully younger to coffee with genuine curiosity. Not to mentor them, but to learn from them.

• Reach out to someone ahead of you whose navigation of this chapter you admire.

• Enter a room, an event, or a conversation where people of different ages are present and introduce yourself to someone outside your generation. 

Prune and plant this week.

The social portfolio begins to diversify the moment you invest outside the default. And unlike most investments, this one pays a return immediately in a different conversation and a wider horizon.

That is the edit, and it is also the gift.

Dive into other books and resources:

Books:

The Book - Becca Levy

Books - Dr. Gundry

Research:

Harvard Second Generation Study

Quality and diversity of relationships

Overview and Findings from the Rush Memory and Aging Project - PMC