If you want to make a decision, you will probably agree with me that it’s more likely that you’ll end up making that decision, or at least that it’s possible to alter the likelyhood that you’ll make a certain decision by thinking (otherwise your question would be better stated as “if physics is deterministic, does ethics matter”). And, under many worlds, if something is more likely to happen, then there will be more worlds where that happens, and more observers that see that happen (I think this is usually how it’s posed, anyway). So while there’ll always be some worlds where you’re not altruistic, no matter what you do, you can change how many worlds are like that.
Thanks, I haven’t thought about this enough to say with confidence, but it seems plausible that many-worlds implies determinism such that this is really a question about determinism / living in a deterministic system.
If you want to make a decision, you will probably agree with me that it’s more likely that you’ll end up making that decision, or at least that it’s possible to alter the likelyhood that you’ll make a certain decision by thinking (otherwise your question would be better stated as “if physics is deterministic, does ethics matter”). And, under many worlds, if something is more likely to happen, then there will be more worlds where that happens, and more observers that see that happen (I think this is usually how it’s posed, anyway). So while there’ll always be some worlds where you’re not altruistic, no matter what you do, you can change how many worlds are like that.
Thanks, I haven’t thought about this enough to say with confidence, but it seems plausible that many-worlds implies determinism such that this is really a question about determinism / living in a deterministic system.