In 1954, Muzafer Sherif conducted a groundbreaking field experiment on intergroup conflict and cooperation with 22 twelve-year-old boys at a summer camp in Robbers Cave State Park, Oklahoma.

Phase 1: Building Group Identity

Boys were divided into two groups — the Eagles and the Rattlers — kept separate and encouraged to bond within their groups through activities and challenges.

Phase 2: Creating Conflict

The groups were introduced to each other through competitive games with prizes. Within days, hostility escalated dramatically: name-calling, cabin raids, burning each other's flags, and physical confrontations.

Phase 3: Reducing Conflict

Simple contact between groups didn't reduce hostility — it intensified it. What worked was superordinate goals: problems that required cooperation from both groups to solve (a broken water supply, a stuck truck). Shared challenges dissolved the hostility that competition had created.

Legacy

Robbers Cave remains one of the most powerful demonstrations of how quickly ordinary people form hostile group identities — and what conditions actually resolve them. It is foundational to conflict resolution theory and diplomacy.

Reference:

Wikipedia: Robbers Cave Experiment

https://en.wikipedia.org/wiki/Robbers_Cave_experiment