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This is the class blog for Phil 3377, Animal Rights, at SMU. Visit often to find material presented during class, including lecture notes, visuals, links to videos, etc.

8.31.2026

Duties to animals?


 Field trips

  1. instructions
  2. field trip brainstorming
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Humans and animals: classics
  1. Bible
  2. Aristotle (4th century BC)
  3. Rene Descartes (1596-1650) [day-CART]
  4. Immanuel Kant (1724-1804) [rhymes with "font"]
  5. Jeremy Bentham (1748-1832)
  6. Peter Singer (wrote 1970s onward)
  7. Tom Regan (wrote 1970s onward)
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Another word about Descartes
  1. Does Descartes think animals have ... reason, emotion, sensation?
  2. Are they any modern Cartesians or is this an outmoded view of animals?
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Kant's Ethics

The Categorical Imperative (the one moral principle we must abide by)

I. Never treat persons as a means only, but always also as ends in themselves.


II. Act only on a policy that you could and would want all other persons to follow.

Why must we treat persons this way? they have a special dignity because of their 

  • self-awareness
  • rationality
  • capacity for morality

Thus, persons are owed respect. This is the basis for all our specific duties.


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Do we have any duties to animals?
  • No, they don't have these features, don't have dignity, aren't owed respect.

"Baumgarten speaks of duties towards beings

which are beneath us and beings which are

above us. But so far as animals are concerned,

we have no direct duties. Animals are not self-

conscious and are there merely as a means to an

end. That end is man."  (para 24)

"Our duties toward animals are merely indirect duties

toward humanity. Animal nature has analogies

to human nature, and by doing our duties to

animals in respect of manifestations of human

nature, we indirectly do our duty towards

humanity."  (para 24)

  • Our apparent duties to animals are actually duties to humans.
  • They're indirect duties to humans because the action involves an animal

This woman has no duty at all TO THE CAT
She has a duty TO HUMANITY that involves the cat.


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Why do we have a duty TO HUMANITY to be kind to animals? 

"Thus, if a dog has served his master

long and faithfully, his service, on the analogy

of human service, deserves reward, and when

the dog has grown too old to serve, his master

ought to keep him until he dies. Such action

helps to support us in our duties towards human

beings, where they are bounden duties." (para 24)

"If a man shoots his dog because

the animal is no longer capable of service, he

does not fail in his duty to the dog, for the dog

cannot judge, but his act is inhuman and

damages in himself that humanity which it is

his duty to show towards mankind." (para 24)

"If he is not to stifle his human feelings, he must practice

kindness toward animals, for he who is cruel to

animals becomes hard also n his dealing with

men. We can judge the heart of a man by his

treatment of animals. Hogarth depicts this in

his engravings. He shows how cruelty grows

and develops. He shows the child’s cruelty to

animals, pinch the tail of a dog or a cat; the

then depicts the crown man in his cart running

over a child; and lastly, the culmination of

cruelty in murder. He thus brings home to us in

a terrible fashion the rewards of cruelty, and

this should be an impressive lesson to children." (para 24)


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 Did Kant care about ANIMALS at all?


"The more we come in contact with animals and

observe their behavior, the more we love them,

for we see how great is their care for their

young. It is then difficult for us to be cruel in

thought even to a wolf. Leibnitz used a tiny

worm for purposes of observation and then

carefully replaced it with its leaf on the tree so

that it should not come to harm through any act

of his. He would have been sorry—a natural

feeling for a humane man—to destroy such a

creature for no reason." (para 24)

Bottom line (end of para 24)

  1. Should care for your dog, even in old age
  2. Vivisection can be justified
  3. "cruelty for support" cannot be justified
But all duties toward animals are actually (indirect) duties toward humans.

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We'll talk about Bentham next time, since Peter Singer quotes him.

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Animal Ethics Camps
  • Demoters -- give animals very low status
  • Humane traditionalists -- we have limited duties to animals but do owe them some consideration
  • Animalists -- raise the status of animals, possibly to human-animal equality
White board