In a small company, culture spreads by osmosis. Everyone sits near the founder, hears the founding stories first-hand and sees how decisions get made. Nobody needs a values document — you just watch.
Then the company grows, and something quietly breaks.
The proximity limit
Anthropologist Robin Dunbar's work suggests people can maintain roughly 150 stable relationships. Somewhere between 100 and 200 employees, the founder can no longer know everyone, and culture stops travelling through direct contact. Three things happen:
- The founder's influence gets filtered through layers of managers, each adding their own interpretation.
- Founding stories stop circulating. New joiners never hear why things are done the way they are.
- Hiring dilutes the norms. Each cohort of newcomers learns culture from the cohort before — and drift compounds.
Managers become the culture
Past this point, managers become the main carriers of culture. That's why research consistently finds that managers explain a large share of the differences in engagement between teams.
Design it before it breaks
- Write down your values and stories while they're still clear — what you do, and why.
- Separate three things: genuine non-negotiables, preferences, and accidental habits that have simply drifted in.
- Invest in managers as the main lever for culture at scale.
- Measure culture by team, not just company-wide — drift shows up in pockets first.
- Build systems that carry the culture: recognition, story-sharing and communication rituals that don't depend on the founder being in the room.
If your culture currently runs on proximity, the time to design it is before you need to.
Try the rituals: Values Moment · Onboarding Story Walk · Culture Drift Check
Adapted from research and writing by the team at Happily.ai, a Rituals of Work partner. Figures come from Happily's own platform data and are observational — they show associations, not proof of cause.
