Shared practice seems to bind a group through four ingredients: moving or sounding in time together, paying a cost together, being visibly seen by everyone, and all knowing that everyone else knows. The cheap, safe ways to get them are singing, walking, working to a shared beat and eating together, while extreme or painful ordeals are not needed and are not recommended.

Social cohesion through shared practice is the strengthening of group identity and cooperation by activities done together, especially synchronised, costly or public ones.

Four Ingredients, Cheap Versions

A classic sociological idea holds that gatherings with shared action and shared emotion create a feeling of unity (“collective effervescence”, associated with Durkheim, recalled). Later experiments are consistent with parts of it. All of the findings below are from my recollection and are not re-checked.

IngredientFinding I recallCheap, safe version
Moving in timeParticipants who walked or moved in step cooperated more in experimental games than those who did notGroup walks, marching to a work beat, dances (Games, Recreation & Organized Sport)
Singing togetherGroup singing was linked to higher pain tolerance and a stronger sense of closenessSongs, call-and-response (Music & Simple Instrument Making)
Shared costPainful or demanding rituals were linked in field studies to greater generosity among participantsShared labour, early starts, fasting only where safe; not pain
Shared attentionSpectators’ heart rates followed those of performers in a fire-walking ritual, in one studyBeing present for the same event

The causal story is not settled. People who already trust each other may be the ones who join demanding rituals, and cohesion does not require suffering. The hormone explanation that is often repeated (that synchrony raises oxytocin and lowers cortisol) I cannot source and would not rely on.

What You Need

  • A recurring occasion — weekly meal, seasonal gathering, work party
  • A shared action everyone can do — singing, walking, a shared task
  • Public acknowledgement — contributions named aloud (Group Morale & Community Motivation)
  • Room for those who cannot join — a person who cannot sing or walk still takes part another way

Method: Build In The Ingredients

Step 1: Pick a regular occasion and attach one shared action to it.

Step 2: Add the sound or the step. A work song or a shared rhythm takes no resources.

Step 3: Make a small shared cost. Everyone contributes labour or food. Do not use pain, injury, humiliation or exhaustion.

Step 4: Name and thank. Let people see their part acknowledged.

Step 5: Watch who is outside. Strong in-group feeling can harden against outsiders and newcomers; see Integration of New Members and Designing Inclusive Rituals.

Common Mistakes

  • Cohesion through hardship. Painful or frightening initiations are cruel and can injure; choose shared effort, not suffering.
  • Forcing enthusiasm. Compelled participation produces resentment.
  • Excluding by design. Rituals that require a skill or ability some members lack split the group.
  • Over-trusting the hormone story. Build the practice for what you can see it doing.

Crowds, drink and fire

Dancing, marching and singing in a crowd at night raise the risk of falls, crushes and burns. Keep walking surfaces clear, keep fire away from the dancing area, keep alcohol out of events with children, tools or fire, and use daylight where possible (Fire Management).

What’s Next

Unverified references

The collective-effervescence idea (Durkheim), the synchrony and cooperation experiments, the group-singing and pain-threshold work, the field studies of demanding rituals and the fire-walking heart-rate study are all from recollection and not re-checked.