The Island of Dr. Moreau
How we cite our quotes:
Without taking my eyes off the black form before me I stooped and picked up this lump of rock. (9.38)
It's not a coincidence that Prendick defends himself with a rock, weapon of choice for prehistoric man. Sure beats the alternative though.
"Back to the House of Pain—back to the House of Pain," gabbled the Ape Man, as though the idea was sweet to him. (16.70)
In terms of being primitive, the Beast Folk aren't primitive because their society is less tech savvy than ours. According to the novel, they're primitive because they enjoy the idea of another creature's pain. Of course, a civilized human would never do something like… that… oh... never mind.
Poor brutes! I began to see the viler aspect of Moreau's cruelty. I had not thought before of the pain and trouble that came to these poor victims after they had passed from Moreau's hands. (16.90)
Prendick realizes that what's really gotta stink for the "brutes" is not just the pain they endure on Moreau's operating table. It's also the messed-up-ness that's comes with the whole half-man half-beast thing. Moreau takes it to a whole 'nother level of savagery.