Our human species behave very similar to other animals on this planet, we kill for resources, to get a female, and to protect our territory or to get a new territory. Look how chimpanzees fight each other for territory or protect their territory, fight to mate, and for resources as well. We steal from each other just like how a grizzly bear steals from wolves when they finally made a kill.
Most of us like to believe that humans are so different from every living thing on this planet. That we must have been created by God, but in reality, it took billions of years of evolution to make something like humans to exist on this planet, and eventually, we will be extinct like other animals have been. It seems that certain natural event happens like volcano eruptions or earthquakes to kill animals that are too successful so it can give a chance for another type of animal to evolve, that is what happen to the dinosaurs, so eventually, it will happen to us as well.