GE Morton wrote: ↑March 28th, 2020, 11:50 am "Value" is not a property of things; it is a pseudo-property imputed to things by some person, some valuer. It merely denotes that a thing is desired by some person and is worth pursuing.To repeat: this is true only of extrinsic values, not of intrinsic values.
Subjectivists tend to overlook evolution, and non-human animals. There are things such as food and sex which are pleasant, and are advantageous for natural selection, and things like physical injury which are unpleasant, and have negative selective value. Pleasantness of experience motivates animals to seek out the thing that is pleasant (e.g. sex or food), and unpleasantness (e.g. pain) motivates them to avoid the thing that is unpleasant (e.g. injury). Pleasure thus has a positive value for animals, and unpleasantness or pain has a negative value.
The point about this, for philosophy, is that the value the animal places on the pleasantness or unpleasantness is not a value attributed by the animal to pleasantness or unpleasantness simply because it desires pleasantness and desires to avoid unpleasantness; it's the other way round: the animal desires pleasure because pleasure has an intrinsic positive value, and it desires to avoid pain because pain has an intrinsic negative value.
Consider these two worlds:
a) In world A, sex and food, unlike in our world, are unpleasant, while injury is pleasant. This is presumably a possible world, but I think it is obvious that in such a world, animals would be very unsuccessful at passing on their genes, because they would avoid sex and food and seek out injury. Animals would tend to starve and injure themselves, and would be far less likely to pass on their genes than in our world. Evolution would have a hard time getting going at all in such a world.
b) In world B, as in world A, sex and food are unpleasant and injury is pleasant, but unlike in either our world or world A, animals place a positive value on unpleasantness (they actively seek out unpleasant or painful experiences) and a negative value on pleasantness (they actively avoid pleasant experiences). In such a world, evolution by natural selection would work exactly as it does in our world: animals would seek out sex and food because these are unpleasant and they place a positive value on unpleasantness, and they would avoid injury because injury is pleasant and they place a negative value on pleasantness.
If subjectivists are right, and there are no intrinsic values, then world B ought to be possible, because since all values are extrinsic, it should be the case that animals can evolve either to place a positive value on pleasure and a negative value on pain, or to place a positive value on pain and a negative value on pleasure. But it seems clear to me that such a world is impossible. It is because of what pleasure is like that it motivates an animal to seek it out, and it is because of what pain is like that it motivates an animal to avoid it. The whole reason why pleasure and pain have the roles they do have in natural selection is that pleasure always confers a positive value on an experience, while pain always confers a negative value on the experience. This ability of pleasure and pain to confer positive and negative value on experiences is therefore not an extrinsic property or pseudo-property attributed to the pleasure or pain by any animal or other experiencing subject; these abilities to confer positive and negative values on experiences are intrinsic properties of pleasure and pain themselves.
It would seem reasonable to say that if some thing X always confers a positive value, then, by virtue of that, X itself must also have a positive value, and this positive value must be intrinsic to X; while if some thing Y always confers a negative value, then, by virtue of that, Y itself must also have a negative value, and this negative value must be intrinsic to Y. If pleasure intrinsically has a positive value, and pain intrinsically has a negative value, then across-the-board subjectivism must be wrong. The resulting theory is ethical naturalism: the pleasantness of experiences is intrinsically good, and the unpleasantness of experiences is intrinsically bad. 'Pleasure is intrinsically good' and 'pain is intrinsically bad' are value judgments, because they use value terms; but they are also objective facts, and thus fact and value are not totally separate, as subjectivists would have us believe. Obviously this does not lead by itself to an objective morality, but it is a step in that direction.