What’s so special about living longer?
November 29, 2011 38 Comments
After reading about the death panel we held at Skepticon IV last week, a very clever philosopher friend of mine named Henry Shevlin wrote to me with a challenge to the transhumanist perspective. The transhumanist argument, which Eliezer made eloquently in the panel, is that death is a terrible thing that we should be striving to prevent for as long as possible.
“Is death a tragedy because it involves a possible loss of utility, or because there’s some special harm in the annihilation of the individual? So consider two scenarios… Earth 1B and Earth 2B. Both of them have 100 million inhabitants at any one time. But Earth 1B has a very high life expectancy and a very low birth rate, while Earth 2B has a lower life expectancy and a very high birth rate. Otherwise, though, the two worlds are very similar. Which world is morally superior, by which I mean, generates more utils? “
Good question. Why, exactly, is prolonging existing lives better than creating new lives?
Let’s start with Henry’s Option 1 — that a person’s death is a tragedy because of the loss of the utility that person would have had, if he hadn’t died. Starting with this premise, can we justify our intuition that it’s better to sustain a pre-existing life than to create a new one?
One possible tack is to say that we can only compare utilities of possible outcomes for currently existing people — so the utility of adding a new, happy person to this world is undefined (and, being undefined, it can’t compensate for the utility lost from an existing person’s death). Sounds reasonable, perhaps. But that also implies that the utility of adding a new, miserable person to this world is undefined. That doesn’t sound right! I definitely want a moral theory which says that it’s bad to create beings whose lives are sheer agony.
You might also be tempted to argue that utility’s not fungible between people. In other words, my loss of utility from dying can’t be compensated for by the creation of new utility somewhere else in the world. But that renders utilitarianism completely useless! If utility’s not fungible, then you can’t say that it’s good for me to pay one penny to save you from a lifetime of torture.
Or you could just stray from utilitarianism in this case, and claim that the loss of a life is bad not just because of the loss of utility it causes. That’s Henry’s Option 2 — that death is a tragedy because there’s some special harm in the annihilation of the individual. You could then argue that the harm caused by the death of an existing person vastly outweighs the good caused by creating a new person. I’m uncomfortable with this idea, partly because there doesn’t seem to be any way to quantify the value of a life if you’re not willing to stick to the measuring system of utils. But I’m also uncomfortable with it because it seems to imply that it’s always bad to create new people, since, after all, the badness of their deaths is going to outweigh the good of their lives.
ETA: Of course, you could also argue that you care more about the utils experienced by your friends and family than about the utils that would be experienced by new people. That’s probably true, for most people, and understandably so. But it doesn’t resolve the question of why you should prefer that an unknown stranger’s life be prolonged than that a new life be created.