The universe may also contain a large number of rapidly expanding friendly AIs. The likelihood of one arising on this planet may correlate with the likelihood of it arising on other planets, although I'm not sure how strong a correlation we can suppose for intelligent life forms with completely different evolutionary histories. In that case, anything that increases the chance of friendly AI arising on this planet can also be taken to decrease our chance of being subsumed by an extraplanetary unfriendly AI.
An AI that is friendly to one intelligent species might not be friendly to others, but such AI should probably be considered to be imperfectly friendly.
This seems to be conflating a Friendly intelligence (that is, one constrained by its creators' terminal values) with a friendly one (that is, one that effectively signals the intent to engage in mutually beneficial social exchange).
As I said below, the reasoning used elsewhere on this site seems to conclude that a Friendly intelligence with nonhuman creators will not be Friendly to humans, since there's no reason to expect a nonhuman's terminal values to align with our own.
(Conversely, if there is some reason to expect nonhuman terminal values to align wi...
Why do we imagine our actions could have consequences for more than a few million years into the future?
Unless what we believe about evolution is wrong, or UFAI is unlikely, or we are very very lucky, we should assume there are already a large number of unfriendly AIs in the universe, and probably in our galaxy; and that they will assimilate us within a few million years.
Therefore, justifications for harming people on Earth today in the name of protecting the entire universe over all time from UFAI in the future, like this one, should not be done. Our default assumption should be that the offspring of Earth will at best have a short happy life.
ADDED: If you observe, as many have, that Earth has not yet been assimilated, you can draw one of these conclusions:
Surely, for a Bayesian, the more reasonable conclusion is number 2! Conclusion 1 has priors we can estimate numerically. Conclusion 2 has priors we know very little about.
To say, "I am so confident in my beliefs about what a superintelligent AI will do, that I consider it more likely that I live on an astronomically lucky planet, than that those beliefs are wrong", is something I might come up with if asked to draw a caricature of irrationality.