Ogden Nash

It is only when you watch the dense mass of thousands of ants, crowded together around the Hill, blackening the ground, that you begin to see the whole beast, and now you observe it thinking, planning, calculating. It is an intelligence, a kind of live computer, with crawling bits for its wits.

Though as a psychologist I like to think that nothing human is foreign to me, I admit to having been repeatedly flabbergasted by the insouciance, and sometimes relish, with which our ancestors carried out and witnessed unspeakable cruelties.