- Safety from Xrisk is a common good: We all benefit by making it less likely that we will all die.
- In general, people are somewhat selfish, and value their own personal safety over that of another (uniform) randomly chosen person.
- Thus individuals are not automatically properly incentivized to safeguard the common good of safety from Xrisk.
I hope you all knew that already ;)
This is making the somewhat dubious assumption that X risks are not so neglected that even a "selfish" individual would work to reduce them. Of course, in the not too unreasonable scenario where the cosmic commons is divided up evenly, and you use your portion to make a vast number of duplicates of yourself, the utility, if your utility is linear in copies of yourself, would be vast. Or you might hope to live for a ridiculously long time in a post singularity world.
The effect that a single person can have on X risks is small, but if they were selfish with no time discounting, it would be a better option than hedonism now. Although a third alternative of sitting in a padded room being very very safe could be even better.