In short
- To shift a group's norms, you only need around 25% on board. Not a majority.
- That 25% doesn't need authority. It needs consistency.
- In a team of eight, that's two people. You could be one of them.
- Start with one small behaviour. Seeing it spread, if you're consistent, is evidence that what you do matters, and that can build your sense of agency.
How many people do you actually need on board to change a culture? In a big organisation, it can seem simpler just to accept "that's how things are around here". But what if you have more influence than you realise?
A quarter, not a majority
Damon Centola and his team at the University of Pennsylvania tested how group norms shift (Centola and others, 2018). Once a group had settled on a way of doing things, a small committed minority pushed a new one. Below 25% of the group, they failed. At 25% or more, the new norm took over. In one trial, the difference was a single extra person.
Twenty-five per cent. Not fifty. Not "majority buy-in". Although 25% is an estimate, not a guarantee. The groups in the study were 20 to 30 people agreeing on a simple convention online, and real workplaces are messier. But it's a useful guide to how few people it can take.
Consistency, not authority
The committed minority had no special status. What they had was consistency. They showed the new behaviour in every interaction and never slipped back. Where the minority was too small, a few people tried the new way, didn't see it often enough, and went back.
That might sound familiar. Someone tries a new way of running meetings or giving feedback. Nobody else does it. By week three, they've quietly given up.
Why we aim at majorities
We mistake compliance for culture. Surveys and town hall nods measure what people are willing to say. Culture is what people do when no one's watching, and that shifts based on what we see other people doing.
Culture is local
Different teams run on different norms, often within the same business. A quarter of an organisation of 2,000 is 500 people. A quarter of a team is a handful.
In a team of eight, 25% is two people. You could be one.
Start small
This doesn't need a transformation program. It can be one small behaviour, done consistently. Asking the quietest person in the meeting what they think. Raising a problem early rather than at the end of the project. Closing the loop on a decision.
Small is easier to keep doing, and consistency is what counts. It also does something for you. When you see a small change spread, even to one other person, you have evidence that what you do shapes what happens around you. And it beats waiting for the organisation to move.
So what can you do?
Pair up. Who's already doing something you want more of? Or who is also annoyed by AI slop, or meetings that go over time?
Pick one small behaviour. Make it simple, and something that happens quite a bit. If it's meetings that always run late, agree that you'll both set expectations at the start of meetings. Then, towards the end of the meeting, signal that you'll be leaving shortly.
Expect people to slip back. Including yourself. Even when it's a simple behaviour, it can be hard to be consistent. (Simple doesn't always mean easy!) The old way has probably become the default over time, so it takes time to create a new default, especially when you're under pressure. This is where having paired up with someone can make it easier to keep going.
What's one small behaviour you could try?
If you'd like support agreeing a new set of behaviours with your team, and making them stick, that's what Team Foundations is for. Contact us to talk about it.
Related: Ford, 1973, and the infamous Pinto, on how the stories a team runs on can hide what's in plain sight.
