Literature
| Exploring New Ethics for Survival: The Voyage of the Spaceship Beagle (1972) by Garrett Hardin | |
| The Land Ethic (1949) by Aldo Leopold | |
| The Tragedy of the Commons (1968) by Garrett Hardin | |
| Exploring New Ethics for Survival: The Voyage of the Spaceship Beagle (1972) by Garrett Hardin | |
| The Land Ethic (1949) by Aldo Leopold | |
| The Tragedy of the Commons (1968) by Garrett Hardin | |
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