I just watched a TED Talk by psychologist Susan Pinker called “The Secret to Living Longer May Be Your Social Life.” She says the number one predictor for longevity is social integration—not just close relationships with family and friends, but also all those day-to-day connections with people in your community. That means everyone from your neighbor to the barista to the checker at the grocery store.

Pinker emphasized that face-to-face contact matters most because it triggers oxytocin (which helps us trust), lowers cortisol (which reduces stress), and releases dopamine (which gives us a mood boost). She acknowledged we don’t yet have definitive research on the positive effects of online connection, but I’ve also read a 2013 research review suggesting that social media can be a lifeline for people who might otherwise feel isolated. For me, online communication doesn’t replace in-person conversations, but it certainly adds to them.

And the evidence keeps stacking up. The Harvard Study of Adult Development, which has tracked people’s lives for over 80 years, found that the warmth and quality of our relationships are stronger predictors of long-term health and happiness than wealth, fame, or even exercise. A brand-new study in Alzheimer’s & Dementia reported that “super-agers”—people in their 80s with unusually sharp memories—share one major trait: they stay socially engaged. It’s as if social connection is exercise for the brain as well as the heart.

Even online engagement has measurable benefits. A large 2025 meta-analysis of more than 57 studies involving over 411,000 older adults found that regular use of digital technology—including smartphones, social media, email, and even digital games—was linked to a 58% reduced risk of cognitive impairment and a 26% lower risk of cognitive decline. The researchers concluded that staying active digitally can help keep the brain healthier for longer, especially when it involves interactive, socially connected activities.

I see this in my own life. For example, I’m part of a private Story Circle Network group focused on Works in Progress. While our main topic is writing goals, we also share bits of our personal lives. That kind of sharing has turned us into a tiny, loyal support community. I was also part of a group from my hometown, originally formed to reminisce about growing up in rural Texas. Before long, we were sharing current concerns and joys too. Those bonds even led to yearly reunions before Facebook opened the door to a larger group of old friends. And speaking of Facebook, I genuinely enjoy seeing updates from people I wouldn’t otherwise be in touch with. Those quick glimpses into their lives make my world feel bigger and friendlier.

I guess the takeaway from that TED Talk—and from the latest research—is simple: get as much daily human interaction as you can, whether in person or online. Even a quick hello to a stranger can make a difference.

I’m planning to be more intentional about reaching out when I’m out in the world. Knowing that it’s not just pleasant but actually good for my health gives me extra motivation. And honestly, it just makes me feel good.

Speaking of reaching out, I’ll be checking back in with you again tomorrow.

Here’s the link to that TED Talk, if you’d like to watch:

The Secret to Living Longer May Be Your Social Life – Susan Pinker