Many people find the idea of letting a species such as the wolf go extinct to be disconcerting. Many environmental policies are put in place to protect endangered species. Why should it really matter though whether a species goes extinct or not if in the end humans are not harmed? What is the underlying moral reasoning?

While Oliver Leaman's aesthetic justification of efforts to preserve endangered species is certainly one consideration that might be advanced in support of such efforts--as well as efforts to preserve plants and other living organisms, such as coral reefs and rainforests (conceiving of the forest as a whole, an ecosystem, as an organism), and even inanimate natural features of the environment, such as icebergs--it's not clear to me that it's the most satisfactory or compelling consideration. Absent some justification for a principle of plenitude--of maximizing the variety of beings in the world--there is no reason to accept such a justification of efforts to preserve anything. It seems to me, however, that other considerations might be advanced in support of conservation. First, it might be argued that given the interrelationship of species, the elimination of any species, especially a predator like the wolf, which plays an important role in keeping the population of other species in check,...

Does nature have any meaning? I guess the scientists who like to study the stars and the physical chemists who like to study things at the quantum level find something meaningful in nature. But those people usually say that their isn't any kind of ultimate purpose found in nature.

In "Brains in a Vat," the first essay of his book, Reason, Truth, and History , the philosopher Hilary Putnam considers a thought experiment, according to which an ant crawling along the sand produces what would appear to be an image of Winston Churchill. He asks whether this image would count as a depiction of Churchill, and claims that it would not: it would not count as a depiction or representation of Churchill, because the ant has never seen Churchill, and therefore could not have the intention to depict Churchill. The image, therefore, is not intrinsically meaningful: it would take an observer to notice that the ant's tracings resemble Churchill, and to conclude that s/he has seen a representation of Churchill traced in the sand, thereby endowing the ant's tracings with meaning. Nature as a whole, like the ant, does not seem capable of producing meaning: in order to produce meaningful representations (including pictures or words), there must be an agent who knows how to manipulate those signs....