Andreas Mogensen, a Senior Research Fellow at the Global Priorities Institute, has just published a draft of a paper on "Maximal Cluelessness". Abstract:
I argue that many of the priority rankings that have been proposed by effective altruists seem to be in tension with apparently reasonable assumptions about the rational pursuit of our aims in the face of uncertainty. The particular issue on which I focus arises from recognition of the overwhelming importance and inscrutability of the indirect effects of our actions, conjoined with the plausibility of a permissive decision principle governing cases of deep uncertainty, known as the maximality rule. I conclude that we lack a compelling decision theory that is consistent with a long-termist perspective and does not downplay the depth of our uncertainty while supporting orthodox effective altruist conclusions about cause prioritization.
Very interesting comment!
I don't think this defence works, because some of your current preferences are manifestly about future events. Insisting that all these preferences are ultimately about the most immediate causal antecedent (1) misdescribes our preferences and (2) lacks a sound theoretical justification. You may think that Parfit's arguments against S provide such a justification, but this isn't so. One can accept Parfit's criticism and reject the view that what is rational for an agent is to maximize their lifetime wellbeing, accepting instead a view on which it is rational for the agent to satisfy their present desires (which, incidentally, is not Parfit's view). This in no way rules out the possibility that some of these present desires are aimed at future events. So the possibility that you may be clueless about which course of action satisfies those future oriented desires remains.