Often when we discuss morals and ethics, the questions revolve around whether something is right or wrong. Not so with The Island of Dr. Moreau. Here, the questions revolve around whether morality and ethics are even concepts we should bother with. After all, if mankind was shaped by nature, and nature is a careless, merciless machine, aren't we the same? In the grand scheme of things, does anything we do really matter given the size and vast emptiness of the universe? Wow, those are depressing questions to ask, let alone answer. But for those with the gumption, it makes The Island of Dr. Moreau an interesting, if dark, journey.
The only consistently moral character in the novel is M'ling, because he's undyingly loyal to Montgomery. It's actually kind of sweet.
Montgomery is an ethical lush. That is, he becomes more moral when he drinks, which we can tell because he treats the Beast Folk as equals and is more honest with them while he's sauced.