An action is right when it respects the integrity and vital needs and interests of others. It is wrong when it does not.   Many readers will recognize the above ethical declaration as a paraphrase of Aldo Leopold’s well known “Land Ethic.” I came to know and respect Leopold’s work over thirty years ago but haven’t had occasion to revisit him for quite some time, until recently when I began thinking about writing this essay. He spoke about the land and biotic community, and I realized that it’s only a short step from land and biome to Earthly existence as such, which is why my use of “others” in the declaration intends to be inclusive....

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