Felicifia is an online community for all things related to the utilitarianism ethics system. See the tag list for catergories.
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Utilitarianism's got a problem: It recommends maximizing total utility, but if there's even the slightest chance that this total utility could be infinitely large, then the whole system breaks down. Or at least that's the impression we get from reading Nick Bostrom's Infinite Ethics (pdf) paper.
I wrestled with this topic for quite some time recently. I've enjoyed this work more than just about anything else I've ever done (that's me in a nutshell: abstract math + ethics = fun), but it has also left me distressed for my beloved utilitarianism on more than one occasion. I've now got an approach that satisfies me, but perhaps yinz can pick it apart and send me back to square one.