Wolves are an extremely important part of an ecosystem. They help keep the species that are their prey in control. People are fearful of wolves, but they have no reason to be. There has never been an account of a wild wolf attacking a human. Wolves will always go for the weakest prey. That means that you have very little to fear of them attacking healthy livestock and they keep the food chain in order. Without wolves in the world, there would gradually become an overpopulation of deer and other prey of the wolf. With an overpopulation of these, there is in turn an under-population of their prey (plants, smaller animals) and thus disrupting the entire course of existence for many other species.
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