“Humans, too, are becoming numerous. We don’t cull egrets because they are beautiful and ornamental. We don’t cull humans because they are economically useful. However, if left completely unchecked, they would both ruin their environment. They eat; they breed; they shit. Neither is good at keeping their world clean and tidy. Too stupid, essentially.”
―
Peter F. Hamilton,
Exodus: The Archimedes Engine