“From the point of view of the moralist the animal world is on about the same level as a gladiator’s show. [A]nd since the great game is going on in every corner of the world, thousands of times a minute; since, were our ears sharp enough, we need not descend to the gates of hell to hear [sighs and groans of pain like those heard by Dante].”

— Thomas Henry Huxley, The Struggle for Existence in Human Society: Collected Essays IX (1888)