Human is also an animal,but stitting at the most top of world's food cycle.
But if human stays few more centuries here then this place will not be suitable for any organisms to live that is why we are preparing for mars.
getting to top of food cycle was a hard battle, and still humans eat each other, so why you care?
They are not eating each other but they were killing each other in the name or racism,terrorism,country,religion,blah blah.So we are not going to stay here longer.
eating each other wasnt meant litterally, its rather meant, as living off each other by abusing others, desperate situation