Although there are solid pieces of evidence to show that we are no a keystone species. This is a very big argument that had been going on for years. Of course there would be another side to it.

Many people may argue that humans are not the biggest causes of extinction. The 5 mass extinctions of the world all happened in the time when human weren't around for. According to BBC Naturehe Permian mass extinction has been nicknamed The Great Dying, since a staggering 96% of species died out. All life on Earth today is descended from the 4% of species that survived.