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253Article 29Reproduced from Ethics in Science and Environmental Politics (ESEP) with permission of Inter-ResearchESEP 2004:39–43www.esep.deSustainability Ethics: Tales of Two CulturesJohn Cairns, Jr.Department of Biology, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA.E-mail: jcairns@vt.eduABSTRACT: Two small, isolated Pacific islands colonized by Polynesians experienced quite differentfates — Easter Island suffered a major ecological collapse, while Tikopia appears to haveattained sustainability. Both events occurred before European contact and provide valuable evidencein the discussion of sustainability ethics.KEY WORDS: Sustainability · Sustainable development · Carrying capacity · Human conscience ·Sustainability ethics · Cultural norms · IndividualismWe appear to be a species out of control, setting in motion processes that we do not understand withconsequences we cannot foresee.Lester R. BrownTo couple the concept of freedom to breed with the belief that everyone born has an equal right to thecommons is to lock the world into a tragic course of action.Garrett HardinCARRYING CAPACITYElevators, bridges, automobiles, ships, airplanes, lifeboats, and Earth have a finite carryingcapacity for humans. Carrying capacity refers to the maximum, equilibrium number of organisms ofa particular species that can be supported indefinitely in a given environment. A good illustration ofexperiencing carrying capacity can be related in the tale of two small, remote islands in the PacificOcean on which the human population encountered carrying capacity limits and responded inquite different ways. Much can be learned from their two case histories. The time period is after colonizationby Polynesians and before European contact (Kirch 2000). Both islands had no landmassnearby that might furnish resources, nor could the people depend on outside help. The size of theislands allowed a physically fit person to view personally the terrestrial resources available as wellas the nearby ocean.Globalization has made humankind aware of how interconnected and interdependent society hasbecome. Astronomy and space travel have shown that Earth is a small blue dot in a galaxy thatappears lifeless, although life may exist elsewhere in the universe. Even if other parts of the universe

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