[BingoAhoy]

Is it too pessimistic? Human history is filled with empires dominating their weaker neighbors, culling many of them (though not all), for the INgroup's self interest (it's also useful to keep subordinates around to do the menial labor). Even the less ruthless of these "imperialistic" entities such as the United States have a outstanding record. The native Americans can pay witness.

Not to mention what we do to animals. I read during just Superbowl Sunday 500 million chickens are slaughtered for the delight of eating chicken wings in the living room. If animals are nonconscious entities that don't suffer akin to robots then no harm no foul, but that is quintessential mass-scale devouring of another.