Why eating together builds trust: what studies of shared meals show

Short answer

1. research suggests that how people eat together matters, not only that they eat.
2. In UK survey data, people who eat socially more often report more trust in others and more friends they can rely on (Dunbar, 2017).
3. In experiments with 1,476 people, those who ate from one shared plate cooperated more in negotiations and social dilemmas than those who ate the same food from separate plates (Woolley & Fishbach, 2019).

Business has always happened over food. The business lunch, the board dinner, the drink after the conference. Usually it's treated as a nice extra around the real work. The research below suggests the meal itself does some of the work, and that the details of how a meal is shared make a difference.

What is social eating?

Social eating, or commensality, means eating together with others instead of alone. Researchers study it because it is one of the oldest and most universal human rituals. Almost every culture has rules about who eats with whom.

What survey data shows: more shared meals, more trust

Robin Dunbar of the University of Oxford published "Breaking Bread: the Functions of Social Eating" in Adaptive Human Behavior and Physiology in 2017. He analysed a UK national stratified survey on eating habits.

People who eat socially more often said they:

• feel happier and more satisfied with life;
• trust other people more;
• are more engaged with their local community;
• have more friends they can depend on for support.

He also looked at which evening meals left people feeling closer to the people they ate with. Those meals involved more people, more laughter and reminiscing, and alcohol.

The obvious objection is that people with many friends simply eat with others more often. Dunbar tested the direction with a path analysis, and his model suggests that eating together comes first and the bond follows, rather than the other way round. That is still a statistical model on survey data, not an experiment. It is a strong hint, not proof.

In survey data, the evening meals that left people feeling closer had three things in common: more people, more laughter and reminiscing, and alcohol.

What experiments show: one plate, more cooperation

Kaitlin Woolley and Ayelet Fishbach tested something more specific. Does it matter whether people share one dish or each get their own plate?

Their paper, "Shared Plates, Shared Minds", appeared in Psychological Science in 2019, with 1,476 participants across several studies. People who ate from a shared plate, family style, cooperated more in social dilemmas and negotiations than people who ate exactly the same food from separate plates. The effect appeared between strangers too, not only among friends.

Their explanation: sharing a plate requires coordination. You wait, you pass, you notice how much is left for others. That raised how coordinated diners felt with each other, and this feeling led to less competitive behaviour.

In one negotiation exercise described by Chicago Booth, pairs played a simulated labour dispute in which every round without agreement counted as a strike day. Pairs who had shared a bowl reached a deal after nine strike days on average, four fewer than pairs who ate from separate bowls.

Doing something together, at the same time

There is a related line of research that isn't about food at all. In 2009, Scott Wiltermuth and Chip Heath published "Synchrony and Cooperation" in Psychological Science. In three experiments, people who had acted in synchrony with others later cooperated more in group economic games, including games that required personal sacrifice.

Two details are interesting. First, people didn't need to feel happy for it to work: positive emotions were not required. Second, the authors suggest synchrony strengthens a sense of belonging to the group.

Cooking together isn't the same as marching in step, so this is an inference, not a tested claim. But a kitchen is one of the few places where adults still work side by side at the same pace, passing things, waiting for each other, finishing at the same moment.

Sharing a plate means waiting, passing and noticing others. Experiments suggest that small coordination makes people less competitive with each other afterwards.

What we know and what we don't

Why this matters for people who lead

Many business meals are built for the opposite of coordination: separate plates, a fixed menu, a seating plan by rank, a speech between courses. Nothing is wrong with that. It just suggests that if the point of a meal is for people to trust each other, the format is not a detail.

A question worth asking

When did you last eat from the same dish as people you work with, and who passed the plate first?

Where Stilla Circle fits

At the Stilla Circle evenings we are preparing in Vienna, guests cook in pairs with a chef and then eat at one long table. There are no titles and no selling, and phones stay by the door. The idea is that the work of making the meal comes before the conversation, not after it.

FAQ

Sources

1. Dunbar, R. I. M. (2017). Breaking Bread: the Functions of Social Eating. Adaptive Human Behavior and Physiology, 3(3), 198–211. https://doi.org/10.1007/s40750-017-0061-4 (accessed 16 Oct 2026)
2. Woolley, K., & Fishbach, A. (2019). Shared Plates, Shared Minds: Consuming From a Shared Plate Promotes Cooperation. Psychological Science, 30(4), 541–552. https://www.psychologicalscience.org/journals/psychological-science/0956797619830633/ (accessed 16 Oct 2026)
3. University of Chicago Booth School of Business (11 Dec 2018). Trying to get people to agree? Skip the French restaurant and go out for Chinese food. https://www.chicagobooth.edu/media-relations-and-communications/press-releases/trying-get-people-agree-skip-french-restaurant-and-go-out-chinese-food (accessed 16 Oct 2026)
4. Wiltermuth, S. S., & Heath, C. (2009). Synchrony and Cooperation. Psychological Science, 20(1). https://www.psychologicalscience.org/journals/psychological-science/j.1467-9280.2008.02253.x/ (accessed 16 Oct 2026)