Opening
Most of us carry far more contacts than confidants, and we rarely ask why some relationships feel effortless while others quietly drain us. Robin Dunbar’s research gives the pattern a shape. Friendship has layers, and the innermost ones are small, expensive, and worth every hour we invest in them.
The pattern repeats across every circle I have ever been part of.
The idea
Dr Robin Dunbar is an anthropologist and evolutionary psychologist whose name attaches to Dunbar’s number, roughly 150 stable relationships arranged in layers of five, fifteen, fifty, and 150. Our first conversation mapped the layers.
The innermost five are the shoulders to cry on friends, the people who will put everything down when your world falls apart, and they absorb around forty percent of our total social effort. The next ten bring the total to fifteen and take another twenty percent.
Friendship is built on similarity, the seven pillars of friendship, shared language and place, career path, hobbies, worldview, sense of humour, and musical taste. Time is the currency.
One study he cited suggests around 250 hours of contact to move a stranger into the fifteen layer, and our first month of contact with a new person predicts which layer they will land in and how long the bond will last.
He also noted that most friendships beyond the inner circles are friendships of convenience, and that the deepest bonds usually form late in our teens and early twenties, which is why we can pick some of those up years later as though no time had passed.
He said:
“40 percent of our total social effort is devoted to just the five people in that innermost circle.”
His counsel was gently counterintuitive. Do not overthink working relationships. If a bond is functioning, let it flow, and save deliberate effort for the layers that need it.
What I took from it
I first found Robin’s work as the missing piece of my own research puzzle, and this conversation shaped how I design my social ecosystem. Having moved countries in 2021 and raised children far from extended family, I now know the inner five are worth more than a wide, thin orbit.
The hours I protect for those few people are the best invested hours I have. The layers gave me permission to stop spreading myself thin and start going deeper with fewer people.
Three things to try this week
- Write the five names of your shoulders to cry on circle. Then notice who was actually there the last time your world wobbled, and whether the two lists match. Pin the list somewhere you will see it when you are tempted to overcommit. The honest list is shorter than the contact list, and that is the point.
- Give one inner circle relationship forty undistracted minutes this week, with the phone in another room. Forty percent of your social effort belongs to these five. Forty minutes is not much, but it is more than most of these bonds receive. Undistracted time is the currency Dunbar described, spent where it counts.
- Check your seven pillars with a new friend. Find one shared taste, humour or music, and build your next invitation around it rather than around convenience. Pillars shared early predict which friendships survive the first busy season. One shared taste is enough to build a first real invitation on.
Watch and go deeper
The conversation with Robin is embedded below. Watch it for the layers, the pillars, and the Jane Austen turn. Connect with Robin through LinkedIn.
Explore Dr Robin Dunbar on LinkedIn.
New conversations land on the Rediscovering Connection channel most weeks, and you can subscribe at the Rediscovering Connection channel.
Close
Friendship has an architecture, and knowing it makes our effort precise rather than scattered, so the hours we give land where they count. The inner five are few, but they carry the weight of the rest, and they deserve the hours we give them.
Explore the certification, then sit with the question this article closes on.