I’m a philosopher working mainly in ethics and decision theory. My research spans formal and applied ethics, and much of it involves teasing out the implications of abstract normative principles for important real-world problems. I'm interested in questions like how much weight we should give to tiny probabilities of extreme outcomes, how to deal with uncertainty about basic moral principles, how to compare outcomes in which different numbers of people exist, and to what extent we can predict the very-long-run effects of our present actions. I've also recently starting thinking about philosophical questions related to artificial intelligence.

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