James recently posted this general deduction of the NAP in utilitarian terms:
A basic utilitarian proof:
That which is moral is that which causes greatest happiness.
One achieves happiness by satisfying one’s preferences.
All preferences are subjective.
Subjective preferences can only be known by demonstration.
One’s subjective preferences cannot be demonstrated if another uses aggression to impose theirs instead.
Maximum satisfaction of preferences is impossible if there is aggression.
Aggression is always immoral.
The problem with this and the system of utilitarian rights that I understand is this: the definition of aggression. More specifically, it is as follows:
When you use your property, you are acting by maximizing your utility, and are hence guaranteed a Pareto-efficient movement in the world. If someone else messes with your property you are prevented from maximizing your utility.
The problem is “why do only you have the right to utility from your property?” I know this is a shabbily-worded question, but I hope I can explain:
Utility is gained through perception of events and resulting satisfaction in the mind. Maximization of utility exists outside of the objective world, however. What I mean is that for you to experience the utility of using a ball, the ball need not in fact be actually there in the real world. As long as you perceive the ball in the same way and it behaves like an object in the real world, you gain the utility. Hence, utility maximization doesn’t have an inherent tie to the objective world, but to the one of perception.
This is where the problem comes in. Imagine a mind experiment where a person is watching some location ten miles from where he is through a camera on a big TV screen. There is a ball on the ground in the center of the image, and a few people are walking around. None of them interact with the ball. The ball is nice. Then, a researcher comes to the person and tells him that the ball has been gifted to him (the person watching the screen). Ecstatic, the person’s like “Alright!” Yet he is currently preoccupied with looking at the video screen, and he decides not to go to retrieve “his” ball at the moment. A few minutes later, however, a guy walks up to the ball, picks it up, runs into a car, and drives off in a puff of smoke.
There are two possibilities:
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The ball was indeed gifted to him
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It wasn’t, and they lied to him
Now, to the guy seeing “his” ball being taken away, the situation is just the same. The perception is what matters. There is no variable “ownership” that is objectively attached to the ball and that says “only person X’s utility may be maximized using this ball.”
Hence, utility exists within the (artificial) concept of property rights and cannot be used to justify their existence.
Am I misunderstanding subjective utilitarianism?