Multi-part series · 5 parts
The Science of Dunbar's Number
A multi-part deep dive into the cognitive limits of human relationships and their implications for social networks.
Start SeriesAbout the series
A multi-part deep dive into the cognitive limits of human relationships and their implications for social networks.
Series parts
- Part 1
Dunbar's number: how many close friends can you actually have?
Robin Dunbar's research gives a surprisingly precise answer to the most important question about your social circle — and the consequences change everything.
11 min - Part 2
The 5 friendship languages — how to show up for the people who matter
Some show care through words, others through time, help, touch, or small gifts. Which language do you speak — and which does your best friend?
8 min - Part 3
How often should you check in with friends? A layer-by-layer cadence.
A researched cadence per closeness layer: weekly for the inner 5, monthly for the 15, quarterly for the 50, yearly for the outer 150.
7 min - Part 4
When (and how) to reconnect with a friend you've lost touch with
Research is clear: receivers appreciate the message far more than senders predict. Here's how and when to reach out — and what's actually stopping you.
8 min - Part 5
Personal CRM vs. your contacts app: when do you actually need one?
Most people don't think they need a personal CRM. Most people are right. Here's the honest answer to when you do — and when you don't.
7 min