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What is the tragedy of the commons?

The tragedy of the commons is when individuals, each acting in their own interest, overuse a shared resource until it's ruined for everyone. Think of a shared pasture overgrazed because each herder keeps adding just one more animal.

See it, don’t just read it.
Watch a 2-minute lesson with voice + animation that explains the tragedy of the commons.
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Key things to understand

  • 1A resource is shared and open to all (a pasture, fishery, or the atmosphere).
  • 2Each person gains by using a bit more, but the cost is shared by all.
  • 3Everyone follows that logic, so the resource gets depleted or destroyed.
  • 4No single user has an incentive to hold back alone.
  • 5Solutions include rules, ownership, or cooperation.

Frequently asked questions

What is an example of the tragedy of the commons?
Overfishing: each boat profits by catching more, but together they collapse the fish stock everyone depends on.
Why does it happen?
Each user gets the full benefit of taking more while the cost is spread across everyone, so individually it always seems worth it.
How can the tragedy of the commons be prevented?
Through shared rules, quotas, taxes, private ownership, or community agreements that align individual incentives with the group's.

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