Welcome to The Nonlinear Library, where we use Text-to-Speech software to convert the best writing from the Rationalist and EA communities into audio. This is: Person-affecting views can often be Dutch booked, published by Rohin Shah on July 7, 2022 on The Effective Altruism Forum.
This is a short reference post for an argument I wish was better known.
A common intuition people have is that our goal is "Making People Happy, not Making Happy People". That is:
Making people happy: if some person Alice will definitely exist, then it is good to improve her welfare
Not making happy people: it is neutral to go from "Alice won't exist" to "Alice will exist". Intuitively, if Alice doesn't exist, she can't care that she doesn't live a happy life, and so no harm was done.
This position is vulnerable to a Dutch book, that is, there is a set of trades that it would make that would achieve nothing and lose money with certainty. Consider the following worlds:
World 1: Alice won't exist in the future.
World 2: Alice will exist in the future, and will be slightly happy.
World 3: Alice will exist in the future, and will be very happy.
(The worlds are the same in every other aspect. It's a thought experiment.)
Then this view would be happy to make the following trades:
Receive $0.01 to move from World 1 to World 2 ("Not making happy people")
Pay $1.00 to move from World 2 to World 3 ("Making people happy")
Receive $0.01 to move from World 3 to World 1 ("Not making happy people")
The net result is to lose $0.98 to move from World 1 to World 1.
FAQ
Q. Why should I care if my preferences lead to Dutch booking?
This is a longstanding debate that I'm not going to get into here. I'd recommend Holden's series on this general topic, starting with Future-proof ethics.
Q. In the real world we'd never have such clean options to choose from. Why does this matter?
See previous answer.
Q. In step 2, Alice was definitely going to exist, which is why we paid $1. But then in step 3 Alice was no longer definitely going to exist. If we knew step 3 was going to happen, then we wouldn't think Alice was definitely going to exist, and so we wouldn't pay $1.
If your person-affecting view requires people to definitely exist, taking into account all decision-making, then it is almost certainly going to include only currently existing people. This does avoid the Dutch book but has problems of its own, most notably time inconsistency. For example, perhaps right before a baby is born, it take actions that as a side effect will harm the baby; right after the baby is born, it immediately undoes those actions to prevent the side effects.
Q. What if we instead have ?
Often these variants are also vulnerable to the same issue. For example, if you have a "moderate view" where making happy people is not worthless but is discounted by a factor of (say) 10, the same example works with slightly different numbers:
Let's say that "Alice is very happy" has an undiscounted worth of 2 utilons. Then you would be happy to (1) move from World 1 to World 2 for free, (2) pay 1 utilon to move from World 2 to World 3, and (3) receive 0.5 utilons to move from World 3 to World 1.
More generally, Arrhenius proves an impossibility result that applies to all possible population ethics (not just person-affecting views), so (if you want consistency) you need to bite at least one of those bullets.
Further resources
On the Overwhelming Importance of Shaping the Far Future (Nick Beckstead's thesis)
An Impossibility Theorem for Welfarist Axiologies (Arrhenius paradox, summarized in Section 2 of Impossibility and Uncertainty Theorems in AI Value Alignment)
For this post I'll assume that Alice's life is net positive, since "asymmetric" views say that if Alice would have a net negative life, then it would be actively bad (rather than neutral) to move Alice from "won't exist" to "will exist".
By giving it $0.01, I'm making it so that it strictly prefers to take the trade (rather than being indifferent to t...