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Volume VI · To Whom Do We Owe Moral Consideration? · chapter 3

Does the criterion of sentience discriminate against those who do not belong to the animal kingdom?

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The sentience criterion isn't “kingdomism”: it doesn't include all animals (sponges probably don't feel) or exclude other kingdoms on principle; it includes any sentient being, even a non-organic one, should one come to exist.

Original text Luciano Carlos Cunha · Volume VI, p. 15 of the PDF edition · English translation

The criterion of prescribes that we give to all beings that have the capacity to have experiences, such as suffering and pleasure. The criterion of sentience is sometimes accused of committing a kingdom-based discrimination, by including members of the animal kingdom in the sphere of moral consideration and excluding members of other kingdoms, such as plants and fungi.

However, proponents of the criterion of sentience do not claim that we should consider sentient beings because sentience is a characteristic of the animal kingdom. Instead, they hold that we should consider a large share of animals because they are sentient and, therefore, can be harmed and benefited.

Although every sentient being found to date belongs to the animal kingdom, there are members of the animal kingdom that, because they have no nervous system, or not even a minimally organized one, are very probably not sentient10 (such as sponges and jellyfish, for example). Proponents of the criterion of sentience do not advocate considering these animals since, according to the criterion of sentience, there is no possibility of their being harmed and/or benefited (whatever we do will make no difference to them, since there is no one there for whom things could go better or worse; there is only a living body).

If it were someday discovered that, for example, a certain plant or fungus is sentient, then the criterion of sentience would include it in the sphere of moral consideration, giving it . However, to date there is no evidence of anything like this. In the future, if sentient robots, sentient machines, sentient beings in digital media, or any other form of nonorganic sentience come to exist, the criterion of sentience would include them in the sphere of moral consideration, giving them equal consideration (since they could be harmed and/or benefited)11.

Therefore, the accusation of “kingdomism” does not hold up. The criterion of sentience is different from the criterion "belonging to the animal kingdom".

Text by Luciano Carlos CunhaA Journey Through Animal Ethics collection, Volume VI
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Practice

Study layer. The answers are based on the chapter’s text.

What examples of probably non-sentient animals does the chapter give?

Would a non-organic sentient being be included by the criterion?

Food for thought

Which beings do you include in your consideration just because they're “animals,” without asking whether they feel?

Author’s notes 2
  1. 10 On this, see Ética Animal (2015e). ↩
  2. 11 On why we should take the possibility of nonorganic sentience seriously, see (2015b). ↩
Sources cited in this text 2

The full list for the volume is in the Volume VI references.

This chapter in Volume XII

How the author sums up this debate in The Essentials of Animal Ethics.

The sentience criterion discriminates on the basis of kingdoms, since it excludes those who do not belong to the animal kingdom (VI, ch. 3).
Being sentient is not the same as being an animal. There are nonsentient animals (such as sponges, for example), and in the future there may be sentient beings that are not animals (for example, if sentience in digital media is possible). The criterion prescribes considering all sentient beings, regardless of whether or not they belong to the animal kingdom.

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