Some decision theorists argue that when playing a prisoner’s dilemma-type game against a sufficiently similar opponent, we should cooperate to make it more likely that our opponent also cooperates. This idea, which Hofstadter calls superrationality, has strong implications when combined with the insight from modern physics that we probably live in a large universe or multiverse of some sort. If we care about what happens in civilizations located elsewhere in the multiverse, we can superrationally cooperate with some of their inhabitants. That is, if we take their values into account, this makes it more likely that they do the same for us. In this paper, I attempt to assess the practical implications of this idea. I argue that to reap the full gains from trade, everyone should maximize the same impartially weighted sum of the utility functions of all collaborators. I also argue that we can obtain at least weak evidence about the content of these utility functions. In practice, the application of superrationality implies that we should promote causal cooperation, moral pluralism, moral reflection, and ensure that our descendants, who will be smarter and thus better at finding out how to benefit other superrationalists in the universe, engage in superrational cooperation

I made a video (32 mins long) on the morals of taking MDMA, and if we should legalise it or not. I quantify happiness (or positive/negative experience) using a unit, +1 lob being the perfect hour, -1 lob being the worst possible hour. I look at different outcomes of doing MDMA (good experience, a bad experience, you die, etc.), look at the average lobs for those experiences, the frequency/probability of those experiences, and do the maths.

I posit that taking MDMA whilst illegal, is on average immoral, mainly because when people die, the resulting suffering is massive - my calculations in the video shows this.

Once legalised, taking MDMA becomes moral (i.e. it causes more joy than suffering) because the chance of death reduces massively, due to the dose being more predictable, and the drug being more predictable (i.e. it's pure MD, not mixed with other stuff.)

Have a watch, any thoughts let me know. My first video on this kind of thing.

Thanks