Psychology
Group Boundaries and Status Hierarchies Within Voluntary Associations
Quick fact
Even in groups created randomly—like in classic 'minimal group' experiments—people quickly display favoritism toward their own group, showing that the mere act of being part of a group can trigger boundaries and status distinctions.
Why this is interesting
You join a book club expecting a relaxed meeting of equals—yet within a few weeks, an informal pecking order emerges. Why do even purely voluntary groups develop insiders, outsiders, and status rankings?