Reprising an ancient strand of philosophical reasoning, contemporary environmental theorists often argue as if nature (the land, ecosystems) were a repository of value in itself, establishing guidelines for human conduct in moral and political matters. John Stuart Mill supposedly discredited such reasoning in his 1854 essay, “Nature.” But modern intrinsic-value-in-nature theories differ from those that Mill attacked, as a careful reading of Leopold's A Sand County Almanac reveals. Leopold, whose thought provides the inspiration for most of the intrinsic-value-in-nature theorizing within environmental philosophy today, tacitly rejects the modernist, physics-derived view of nature as a realm of timeless, abstract laws. He replaces it with a view of the land and its creatures as historically concrete, unique totalities that can almost be read as “texts,” and thus may inspire respect and love (rather than detached theorizing alone) on the part of the ecologically-aware person. The key virtue for Leopold is “perception,” a blend of training, hermeneutic skill, and identification with the natural world.