Core Concepts: The tragedy of the commons, and the evidence against it
Template layer — city-agnostic. This file is background for the other four. It explains why the eight design principles exist at all, and why this project treats documented practice as more reliable than formal rules.
The parable
In December 1968 the ecologist Garrett Hardin published a short essay in Science called “The Tragedy of the Commons.” It contains a thought experiment that has probably done more to shape public policy than any other single page of the century.
Picture a pasture open to all. Each herdsman keeps his animals there. Adding one more animal brings him the full value of that animal; the cost, in overgrazing, is spread across everyone. So the rational move is always to add another. And another. Every herdsman reasons the same way. “Freedom in a commons brings ruin to all.”
The essay concluded that the only escape was “mutual coercion, mutually agreed upon.” But that is not the lesson most readers took. What took hold was a fork with two prongs: privatize the resource, or hand it to the state. Everything else was said to end in collapse.
That fork became the default setting of environmental policy, development economics and resource law for the next several decades. It is still the default setting of most arguments about anything shared.
What the parable actually describes
Elinor Ostrom’s first objection was structural, and it is worth stating carefully because it is often mangled.
Look at what Hardin’s herdsmen are permitted to do. They cannot talk to each other. They cannot make an agreement and be bound by it. They cannot watch what the others are doing. They cannot punish someone who takes more than their share. They cannot change any of the arrangements they are operating under.
Strip all of that away and yes, the pasture is destroyed. But a resource with no communication, no agreements, no monitoring and no sanctions is not a commons. It is open access — a free-for-all with nobody’s name on it.
Hardin modelled open access and called it a commons. Real commons, the kind humans have actually run, come with rules. The question was never whether unmanaged sharing collapses. It does. The question is whether the only alternatives are a fence or a bureaucrat.
Hardin himself later accepted the correction, saying the essay should have been titled “The Tragedy of the Unmanaged Commons.” By then the two-pronged fork had a thirty-year head start.
What she did instead of arguing
This is the part that matters for how this project works, and it is why the word “hard” belongs in front of “research.”
Ostrom did not write a rebuttal. She went and counted.
From the early 1970s, working out of the Workshop in Political Theory and Policy Analysis she founded at Indiana University with Vincent Ostrom, she and a large group of collaborators assembled comparative case material on communities managing shared resources: irrigation systems, fisheries, forests, grazing land, groundwater basins. Not anecdotes. A coded database, built to a common template so cases could be compared against each other.
What the cases showed, over and over, was communities that had been governing shared resources successfully for a very long time without either private ownership or state control.
- Törbel, a village in the Swiss alps, has run its alpine grazing, forests and irrigation communally under written rules since at least a charter of 1483. Grazing rights are limited by a rule tying summer pasture to winter feed capacity: you may send up only as many cows as you can feed through the winter.
- The huertas of Valencia, Murcia and Orihuela in Spain divide scarce irrigation water among thousands of farmers under systems that are centuries old. Valencia’s Water Court, the Tribunal de las Aguas, still meets in public, weekly, outside the cathedral, and settles disputes orally in minutes.
- Japanese villages including Hirano, Nagaike and Yamanoka held mountain commons under iriai rights, with detailed written rules about what could be taken and when, monitored by rotating villagers.
- Farmers in the Philippines built and maintained irrigation systems through zanjera associations, allocating both water and the obligation to repair.
- Inshore fishers at Alanya in Turkey, after years of conflict over the best spots, worked out their own rotation: a list of eligible fishers, an assignment of sites, and a rotation through the season so that everyone’s turn at the good places came round.
None of these was designed by an economist. None was imposed. They were worked out by the people who had to live with the result, and several outlasted the states that nominally governed them.
The failures are the point
If the book had only collected successes it would be advocacy, not research. It is not, and this is the part most summaries drop.
Ostrom deliberately gathered cases that failed. Fisheries elsewhere in Turkey that never resolved their conflicts. Irrigation schemes that were built with foreign money, run from a capital city and fell apart. Groundwater basins where users solved some problems and not others.
The eight design principles come from the comparison. They are not a philosophy of the commons. They are the features that showed up in the systems that lasted and were missing or broken in the ones that collapsed. That is why principle 4 is monitoring and principle 5 is graduated sanctions — not because those are nice ideas, but because commons without them failed.
She was awarded the Nobel Memorial Prize in Economic Sciences in 2009, with Oliver Williamson, for this body of work. She remains the only woman to have received it.
Why this file sits in a citizen-engagement toolkit
Three things follow, and all three shape how this site is built.
First, the third option is real and it has conditions. A group of people who share something can govern it themselves. Not always, not automatically, and not without doing the work — but it is a documented outcome, not a hope. When someone says the only choice is the market or the ministry, that is a claim the evidence does not support.
Second, you cannot read governance off the statute book. This is the deeper methodological finding and it is the one this project leans on hardest. Ostrom found formal law and operative practice diverging constantly, in both directions: statutes declaring open access over resources that villagers were in fact managing tightly, and statutes declaring careful management of resources nobody was managing at all. The rules that matter are the ones people actually use, which live in practice and in the records of practice — the minutes, the recorded votes, the signed decisions — and not in the legislation alone.
This is why the issue pages on a site built from this template should be assembled from primary records rather than summaries of them. It is also why an instance of this site will spend a lot of its time reading meeting minutes.
Third, and least comfortable: there are no panaceas. Ostrom’s later work argued directly against one-size-fits-all policy prescriptions. A diagnostic approach for going beyond panaceas (2007) is the clearest statement of it: stop hunting for universal solutions, start diagnosing specific systems in their specific settings.
Whether she said the same about her own eight principles in those words is something we have not been able to verify from a primary source. Scholars working in her tradition are unambiguous that the principles are not a blueprint, should not be applied in cookie-cutter fashion, and require local adaptation — and that treating them as a scoring rubric misuses them. We have taken that as reported, not quoted, because the distinction is exactly the kind this site refuses to blur. The argument does not depend on the attribution: a commons is a specific set of people, a specific resource, and a specific history. Treat the eight principles as diagnostic questions, not as a rubric.
How to apply: when a candidate, official or reporter frames a local question as a choice between private development and public control, that is the 1968 fork being offered as though it were exhaustive. Name the third option and ask what would have to be true for it to work here. The eight principles in file 01 are the list of what would have to be true.
Sources worth reading directly
- Garrett Hardin, “The Tragedy of the Commons,” Science, 1968 — read the original; it is short, and it is not what most people who cite it think it is.
- Elinor Ostrom, Governing the Commons: The Evolution of Institutions for Collective Action, Cambridge University Press, 1990 — the case studies and the eight principles.
- Elinor Ostrom, Understanding Institutional Diversity, Princeton University Press, 2005 — the rules taxonomy that file 03 uses.
- Elinor Ostrom, “A diagnostic approach for going beyond panaceas,” Proceedings of the National Academy of Sciences 104(39): 15181–15187, 2007 — the argument against universal policy prescriptions, and the multi-tier diagnostic framework she offered instead.
- Michael Cox, Gwen Arnold and Sergio Villamayor-Tomás, “A Review of Design Principles for Community-based Natural Resource Management,” Ecology and Society 15(4): 38, 2010 — the empirical test of the eight principles across 91 studies. They found the principles well supported, and reformulated them from eight into ten by splitting several. Worth reading in the other direction from the caution above: “the principles are unreliable” is as much a misreading as “the principles are a scorecard.”