You can almost hear the sound of PZ Myers' palm hitting his face as "a couple of vegetarian philosophers with no knowledge of biology" urge humanity to end predation worldwide—so that no more zebras have to suffer at the fangs of a lion, and no more mice at the talons of an owl. Their plea on behalf of prey species, inspired by the model culling of Cecil the lion, calls carnivory simply 'unnecessary;' PZ writes, "it’s as if they are completely unaware of the fact that predation maintains and increases biodiversity, or that there’s more to wildlife than mammals and birds, or that life is a complex web of interactions — that bears killing salmon is a critical source of phosphorus for trees." PZ follows up on the debate by responding to a related essay that cites "Isaiah's gifts as a prophet" in the Bible; i.e. visions of the leopard and the goat laying together, the wolf and the lamb becoming BFF, etc. As PZ writes, "humans have been busily pauperizing biodiversity in various habitats for a long time" and to continue that trend by targeting predators is the opposite of an moral stand. On the contrary, it would be another misguided step in our long, bloody crusade to anthropomorphize the natural world.
See also: The Value of Biodiversity on Aardvarchaeology
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