Tragedy of Commons Tragedy of the Commons Garrett

Tragedy of Commons

Tragedy of the Commons Garrett Hardin (biologist) 1968 2

Tragedy of the Commons Garrett Hardin (biologist) 1968 3

Tragedy of the Commons Garrett Hardin (biologist) 1968 4

Tragedy of the Commons Garrett Hardin (biologist) 1968 5

Environmental Issues Cross Borders. Photo: Ian Crockart 6

Communal Property and the Tragedy of the Commons Open access systems - have no rules to manage resource use • Commonly held resources are degraded and destroyed by self-interest 7

Tragedy of Freedom in a Commons Pasture Example (the village green) What are the benefits and costs to me of adding one more animal to my herd? Benefit: I get all the biomass generated by that animal Costs: The village green is degraded a bit, but that cost is shared by all other animal owners

Tragedy of Freedom in a Commons Oceans Example (fisheries) What are the benefits and costs to me of taking yet more fish from a stressed population? Benefit: I get all the biomass generated by those fish. Costs: The fish population is further degraded, but that degradation is shared by all my competitors.

National Science Foundation: TOC Chalk Talk (Part 1) • http: //www. youtube. com/watch? v=KZDj. Pnzo ge 0

National Science Foundation: TOC Solutions Chalk Talk (Part 2) • http: //www. youtube. com/watch? v=IVwk 6 VIx BXg