Is It Natural to Drive Species to Extinction?

Whether or not extinction caused by human activities is natural depends on which sense of the term 'natural' is under consideration. Given one sense of that term which has some grip on the popular imagination, it is. This suggests that at a minimum environmentalists should be very careful about invoking 'the natural' and related concepts such as 'acting naturally' when they propose moral principles. I argue here for the stronger claim that the 'natural' is either redundant and serves to obscure more than it brings to light, or that it is bound up with a picture of the world which is false, and so theoretically useless. Thus 'the natural' can do no useful theoretical work in a completely developed environmental ethic.