Eight Principles for Any Shared Thing

Elinor Ostrom won a Nobel prize for documenting something that was widely believed impossible: groups of ordinary people, with no external enforcement, sustainably managing shared resources for centuries.

She studied irrigation systems in Spain and Nepal, alpine pastures in Switzerland, fisheries in Turkey, and forests across several continents. From the cases that worked, she extracted eight design principles. They apply remarkably well to any group sharing something — a community garden, a housing co-op, a shared studio, a cacao circle that has to decide who buys and who cleans up.

One: clearly defined boundaries

Who is in, and what is being shared. Both need to be answerable.

This sounds bureaucratic and it is the most commonly skipped principle in informal groups, which tend to treat membership as a feeling. The failure shows up as resentment about people who turn up occasionally and take as much as regulars, without anyone having ever established what a member is.

Two: rules matched to local conditions

The rules for using the resource must fit the actual circumstances — the climate, the size of the group, the specific thing being shared.

Ostrom found no universal ruleset. Imported rules that worked elsewhere consistently underperformed rules the group developed for its own situation, and the reason turns out to be principle three.

Three: those affected can change the rules

The people living under a rule must be able to participate in modifying it.

This is the one that does the most work. Rules people helped write get followed; rules handed down get gamed. It also explains the failure of imported rules — not that they were wrong, but that nobody in the group had any stake in them.

For a small group: the person who is annoyed about something must be able to raise it and change it, not merely complain about it.

Four: monitoring, by people the group trusts

Someone has to notice what is actually happening — and crucially, in Ostrom's successful cases the monitors were either members themselves or accountable to members, not an outside authority.

Informal groups often skip this on the grounds that monitoring feels like distrust. The cases suggest the opposite: visible, mutual, ordinary awareness of who is contributing is what makes trust sustainable, because it removes the suspicion that someone is quietly taking more.

Five: graduated sanctions

Consequences for breaking rules must start very small and escalate slowly.

This is the principle most often got wrong in both directions. Groups either have no consequence at all — so the rule is decorative — or the first consequence is expulsion, which is so severe nobody is willing to apply it, so it is also decorative.

A first breach warranting a quiet word, a third warranting something more, is the pattern that actually functioned across her cases.

Six: cheap and accessible conflict resolution

There must be a low-cost, fast way to resolve disputes.

Cheap is the operative word. If raising a problem requires a difficult confrontation or a formal meeting, people will not raise problems — they will withdraw instead, which looks like a group quietly losing members for no visible reason.

Seven: the right to organise is recognised

External authorities must not undermine the group's ability to make its own rules.

In her cases this meant governments not overriding local arrangements. In a small group, the analogue is usually a landlord, an institution, or a funder — anyone who can override the group's decisions. If they can, the other seven principles are unstable, because the group knows its rules can be cancelled.

Eight: nested layers, for larger systems

Where the resource is large, governance should sit in nested tiers rather than one central body — small units handling local matters, larger units handling what crosses between them.

This one only applies above a certain size, and for most small groups it is the principle to note and ignore. Its relevance arrives at the point where a group needs to split, which is a good problem.

What this replaces

The framework these principles displaced held that shared resources are doomed — that each individual rationally takes as much as possible and the resource collapses, so the only remedies are private ownership or state control.

Ostrom's contribution was empirical rather than theoretical. She documented large numbers of commons that had functioned for generations under neither, and identified what the functioning ones had in common. The pessimistic model was not wrong about the incentives; it was wrong in assuming people cannot communicate, observe each other, and make binding arrangements — which is precisely what the eight principles describe.

The fifteen minutes

Make a cup and take one group you are part of — a household, a team, a circle, a shared space — through the list.

Do not score all eight. Find the lowest one. In practice, group friction almost always traces to one or two specific failures rather than general dysfunction, and the principles are diagnostic precisely because they are specific.

The three that most often turn out to be the problem in informal groups, in my reading of the list against ordinary situations: boundaries that were never defined, sanctions that jump straight from nothing to catastrophic, and conflict resolution that is too expensive to use.

Then pick the single cheapest fix and propose it. Note that principle three means you cannot simply impose it — proposing it to the people affected is the mechanism, not a courtesy.

If the group in question is one you host cacao for, the arrangement is worth making explicit rather than assumed: who supplies it, who prepares, who cleans, and what happens when someone cannot make it. That is boundaries, rules, and sanctions in miniature, and getting it wrong is how a warm monthly thing quietly stops happening.

On the arrangement above: a 5 lb bag turns group supply into a single decision rather than a recurring negotiation, which is principle one doing its job.