The Tragedy of Common Goods

The Tragedy of the Commons is a concept that explains how individuals, acting rationally in their own self-interest, deplete or severely degrade shared resources—known as common-pool resources—that are open to all, difficult to exclude users from, and subject to competition in consumption. This situation emerges as a social dilemma in which individual rationality leads to collective ruin. Overuse of the resource occurs because each user believes their own action has a negligible impact on the total, yet when all users act similarly, the resource’s sustainability is jeopardized.

Individual Interests Lead to Social Collapse (Generated by Artificial Intelligence)

Definition

The concept of common-pool resources underpinning “The Tragedy of the Commons” is defined by two key characteristics:

1. Non-excludability: It is costly or technically impossible to exclude potential users from accessing the resource. For example, it is difficult to exclude specific individuals from fish stocks in the ocean or from the atmosphere.
2. Rivalry in Consumption: One individual’s use of the resource reduces the amount available for others. When a fisherman catches a fish, it directly decreases the number available for another fisherman to catch.

Examples of such resources include pastures, forests, irrigation systems, groundwater aquifers, fish stocks, and the global atmosphere.

Historical Development and Origin of the Concept

The term “The Tragedy of the Commons” was first introduced by biologist Garrett Hardin in a 1968 article published in the journal Science. In this article, Hardin illustrated his theory using the analogy of a “common pasture.” According to this analogy:

• Each herder grazing livestock on a shared pasture gains the full benefit of adding another animal to their herd, but shares the cost of overgrazing with all other herders.

• Even when the pasture’s carrying capacity is exceeded, adding another animal remains individually rational for each herder, because personal gain outweighs the shared cost.

• According to Hardin, when all herders act in this rational self-interest, the system inevitably collapses. Hardin summarized this situation as: “Ruin is the destination toward which all men rush, each pursuing his own best interest in a society that believes in the freedom of the commons.”

Hardin’s article had a profound impact on environmental policy and ecology, becoming one of the foundational references in discussions about the management of common resources.

Theoretical Approaches

Various theoretical approaches have been developed to address the management of common resources and prevent the tragedy.

Hardin’s Classical Thesis and the Central Authority Solution

Hardin argued that individuals cannot escape this “trap” on their own, because the act of creating and enforcing rules itself constitutes a collective action problem (a second-order dilemma). Under this view, individuals are not expected to self-organize due to their tendency to free-ride on collective rules. Two main mechanisms were proposed as solutions to the tragedy:

• Privatization: Dividing the common resource into parcels and transferring ownership to private individuals. Each owner then has an incentive to manage their resource sustainably for long-term benefit.

• State Control (Central Authority): The state assumes control of the resource by establishing rules, setting quotas, and enforcing penalties. Indeed, in many countries, natural resource management has been delegated to central administrative bodies.

However, it has been observed that centralizing control is not always effective, and in some cases, it accelerates resource depletion. Case studies show that forests under state ownership and coastal fisheries managed by national institutions have often experienced accelerated degradation.

Elinor Ostrom and the Collective Action Approach

Political scientist Elinor Ostrom, awarded the Nobel Prize in Economics in 2009, argued that the tragedy is not inevitable. She contended that while Hardin’s theory applies under specific conditions—such as large user groups, lack of communication, and unclear property rights—users often self-organize to establish sustainable management systems.

Ostrom pointed out that Hardin conflated common-pool resources with open-access resources. According to Ostrom, many resources are not truly ownerless; rather, they are managed through common-property regimes developed by local communities.

Laboratory experiments and field studies have shown that when users can communicate, they are capable of reaching agreements that optimize resource use and generally comply with them. Factors that facilitate successful collective action include:

• Users’ intention to use the resource over the long term (low discount rates).
• Similar interests, skills, and cultural perspectives among users (homogeneity).
• Low communication costs.
• Low costs of reaching binding and enforceable agreements.

Other Approaches

Thinkers such as David Harvey have criticized both Hardin’s and Ostrom’s approaches for insufficient attention to scale and for ignoring global dynamics. Harvey argues that solutions must be sought in creative collective labor methods that regulate the production, distribution, and consumption of common resources.

Applications and Examples

Areas Where the Tragedy Has Occurred

• Global Resources: Oceanic fisheries and atmospheric pollution are the most prominent areas where the tragedy unfolds, due to the difficulty of achieving international cooperation.

• The Gediz Delta Example: The Gediz Delta in İzmir, Türkiye, protected under the international Ramsar Convention, has been studied as an example of the tragedy of the commons. Due to human activities such as industrialization, uncontrolled urbanization, and salt production, wetlands, grasslands, and agricultural land decreased between 1987 and 2010, while settlement areas increased fourteenfold. Despite its protected status, the degradation of the natural landscape demonstrates the tragedy in action.

Examples Where the Tragedy Has Been Overcome

In Türkiye, there are examples where common resources have been successfully managed by users without state intervention:

• Alanya Fisheries Management: Disputes among fishermen in Alanya over exclusive access to productive fishing grounds were resolved in 1969 with the establishment of the S.S. Alanya Aquatic Products Cooperative. The cooperative annually assigned fishing areas through a lottery system and rotated access among members during the season. This system ensured equal opportunity and prevented overfishing, thereby preserving fish stocks.

• Sinop City Traffic Management: Due to Sinop’s geographic structure—a peninsula with a single entry-exit point and narrow roads—traffic signals created long queues. The signal system was removed in 1998. After its removal, an informal order emerged based on unwritten rules, mutual respect, and slowing down among drivers and pedestrians. This illustrates how a common resource—roadways—can be managed through collective user coordination, without a centralized rule system.

These examples support Ostrom’s theory, demonstrating that the tragedy of the commons is not inevitable and can be overcome through appropriate institutional arrangements.