Most right-thinking people today consider the preservation of endangered species to be an ethical imperative. The underlying assumption (correct in the vast majority of cases) is that the endangered species have been brought to the brink as a result of careless human activities. Habitat destruction, hunting, pollution, and other aspects of the modern industrial age have stressed the biosphere so heavily that some ecologists consider it to be a mass extinction event. One of the many animal species facing extinction in coming years is the Tasmanian Devil. However, unlike many others, the Devil is going extinct because of a naturally occurring pathogen: Devil Facial Tumor Disease. This raises an interesting question: Should human beings always seek to prevent the extinction of animal species, regardless of the cause of that extinction?