Book excerpt: Lisa Sideris proposes a new way of thinking about the natural world, an environmental ethic that incorporates the ideas of natural selection and values the processes rather than the products of nature. Such an approach encourages us to take a minimally interventionist approach to nature. Only when the competitive realities of evolution are faced squarely, Sideris argues, can we generate practical environmental principles to deal with such issues as species extinction and the relationship between suffering and sentience.