Land of Hope and Glory

Why we do this to other living souls?We are so cruel as a species, we do what we want just because we are at the top of the food chain. I would like aliens to invade us and treat us same way we treat animals in farming facilities, but i guess not even that will change our ways. We are doomed as a species , sooner or later we will kill everything in out sight, we care only about ourselves. This movie should be shown in schools.