Ramsey famously condemned discounting “future enjoyments” as “ethically indefensible”. Suppes enunciated an equity criterion which, when social choice is utilitarian, implies giving equal weight to all individuals’ utilities. By contrast, Arrow accepted, perhaps reluctantly, what he called Koopmans’ :287–309, 1960) “strong argument” implying that no equitable preference ordering exists for a sufficiently unrestricted domain of infinite utility streams. Here we derive an equitable utilitarian objective for a finite population based on a version of the Vickrey–Harsanyi original position, where there is (...) an equal probability of becoming each person. For a potentially infinite population facing an exogenous stochastic process of extinction, an equitable extinction biased original position requires equal conditional probabilities, given that the individual’s generation survives the extinction process. Such a position is well-defined if and only if survival probabilities decline fast enough for the expected total number of individuals who can ever live to be finite. Then, provided that each individual’s utility is bounded both above and below, maximizing expected “extinction discounted” total utility—as advocated, inter alia, by the Stern Review on climate change—provides a coherent and dynamically consistent equitable objective, even when the population size of each generation can be chosen. (shrink)

In this paper, we argue that our moral concern for future well-being should reduce over time due to important practical considerations about how humans interact with spacetime. After surveying several of these considerations (around equality, special duties, existential contingency, and overlapping moral concern) we develop a set of core principles that can both explain their moral significance and highlight why this is inherently bound up with our relationship with spacetime. These relate to the equitable distribution of (1) moral concern in (...) a universe that we can only causally affect in one temporal direction; (2) access to the benefits from using spacetime as a resource; and (3) the burdens of care given (1) and (2). We conclude by considering the practical implications of our argument and find that, while it is often assumed that a preference for present over future well-being weakens the case for existential risk mitigation, this likely is not the case. (shrink)

In the “Lecture on ethics”, Wittgenstein declares that ethical statements are essentially nonsense. He later told Friedrich Waismann that it is essential to “speak for oneself” on ethical matters. These comments might be taken to suggest that Wittgenstein shared an emotivist view of ethics—that one can only speak for oneself because there is no truth in ethics, only expressions of opinion (or emotions). I argue that this assimilation of Wittgenstein to emotivist thought is deeply misguided, and rests upon a serious (...) misunderstanding of what is implied by the nonsensicality of ethical claims on Wittgenstein's view. I develop a reading of Wittgenstein's remarks in the “Lecture on ethics” on which ethical statements, despite their nonsensicality, reveal the perspective of the speaker. The purpose of ethical language is to elucidate a speaker's perspective. Such elucidations, and the perspectives they reveal, can be evaluated, criticized, and respected on principled grounds even if, as Wittgenstein insists, no ethical judgment can be (objectively) justified by any fact. I contrast Wittgenstein's comments on ethics with some comments made by Frank Ramsey (from the same period), which appear similar to Wittgenstein's remarks on value. Contra Ramsey's insistence that there is “nothing to discuss” about (or within) ethics, a proper understanding of Wittgenstein's views does not commit us to passing over ethics in silence. (shrink)

Argues for a reading of H. P. Lovecraft’s 1927 short story, "The Colour out of Space," as an affective response to the problem of induction. Lovecraft weighs the meaning of our epistemic frailty, drawing on George Santayana’s "Scepticism and Animal Faith." His writing elicits inductive vertigo, the fear that our concepts fail to carve nature at the joints.

This chapter both explains the origins of emotivism in C. K. Ogden and I. A. Richards, R. B. Braithwaite, Austin Duncan-Jones, A. J. Ayer and Charles Stevenson (along with the endorsement by Frank P. Ramsey, and the summary of C. D. Broad), and looks at MacIntyre's criticisms of emotivism as the inevitable result of Moore's attack on naturalistic ethics and his ushering in the fact/value, which was a historical product of the Enlightenment.

Ramsey famously pronounced that discounting “future enjoyments” would be ethically indefensible. Suppes enunciated an equity criterion implying that all individuals’ welfare should be treated equally. By contrast, Arrow accepted, perhaps rather reluctantly, the logical force of Koopmans’ argument that no satisfactory preference ordering on a sufficiently unrestricted domain of infinite utility streams satisfies equal treatment. In this paper, we first derive an equitable utilitarian objective based on a version of the Vickrey–Harsanyi original position, extended to allow a variable and uncertain (...) population with no finite bound. Following the work of Chichilnisky and others on sustainability, slightly weakening the conditions of Koopmans and co-authors allows intergenerational equity to be satisfied. In fact, assuming that the expected total number of individuals who ever live is finite, and that each individual’s utility is bounded both above and below, there is a coherent equitable objective based on expected total utility. Moreover, it implies the “extinction discounting rule” advocated by, inter alia, the Stern Review on climate change. (shrink)