This paper discusses the inefficacy problem that arises in contexts of “collective harm.‘ These are contexts in which by acting in a certain sort of way, people collectively cause harm, or fail to prevent it, but no individual act of the relevant sort seems to itself make a difference. The inefficacy problem is that if acting in the relevant way won’t make a difference, it’s unclear why it would be wrong. Each individual can argue, “things will be just as bad (...) whether or not I act in this way, so there’s no point in doing otherwise.‘ The goal of this paper is to give an overview of some of the main responses available to the problem and to highlight central issues that arise for each type of response. In the final section, I explain what I take to be the most promising strategy and discuss the form that this strategy should take. (shrink)

We naturally attribute obligations to groups, and take such obligations to have consequences for the obligations of group members. The threat posed by anthropogenic climate change provides an urgent case. It seems that we, together, have an obligation to prevent climate catastrophe, and that we, as individuals, have an obligation to contribute. However, understood strictly, attributions of obligations to groups might seem illegitimate. On the one hand, the groups in question—the people alive today, say—are rarely fully-fledged moral agents, making it (...) unclear how they can be subjects of obligations. On the other, the attributions can rarely be understood distributively, as concerned with members’ obligations, because obligations to do something require a capacity to do it, and individual members often lack the relevant capacities. Moreover, even if groups can have obligations, it is unclear why that would be relevant for members, exactly because members often lack control over whether group obligations are fulfilled. In previous work, I have argued that a general understanding of individual obligations extends non-mysteriously to irreducibly shared obligations, rendering attributions of obligations to groups legitimate. In this paper, I spell out how the proposed account also helps us understand the relation between individual and shared obligations. Even though few individual human agents have any significant control over whether we will be successful in preventing climate catastrophe, our collective capacity to prevent catastrophe and shared preventative obligation to do so can give rise to significant individual obligations to contribute to its fulfillment. (shrink)

Many consequentialists argue that you ought to do your part in collective action problems like climate change mitigation and ending factory farming because (i) all such problems are triggering cases, in which there is a threshold number of people such that the outcome will be worse if at least that many people act in a given way than if fewer do, and (ii) doing your part in a triggering case maximises expected value. I show that both (i) and (ii) are (...) false: Some triggering cases cannot be solved by appeal to expected value, since they involve infinities, and some collective action problems are not triggering cases, since they involve parity. However, I argue that consequentialism can still generally prohibit failure to do your part in those collective action problems where we believe that so acting would be impermissible. (shrink)

Why act when the effects of one’s act are negligible? For example, why boycott sweatshop or animal products if doing so makes no difference for the better? According to recent proposals, one may still have a reason to boycott in order to avoid complicity or participation in harm. Julia Nefsky has argued that accounts of this kind suffer from the so-called “superfluity problem,” basically the question of why agents can be said to participate in harm if they make no difference (...) to it. This paper develops and responds to Nefsky’s challenge. (shrink)

On some accounts of vagueness, predicates like “is a heap” are tolerant. That is, their correct application tolerates sufficiently small changes in the objects to which they are applied. Of course, such views face the sorites paradox, and various solutions have been proposed. One proposed solution involves banning repeated appeals to tolerance, while affirming tolerance in any individual case. In effect, this solution rejects the reasoning of the sorites argument. This paper discusses a thorny problem afflicting this approach to vagueness. (...) In particular, it is shown that, on the foregoing view, whether an object is a heap will sometimes depend on factors extrinsic to that object, such as whether its components came from other heaps. More generally, the paper raises the issue of how to count heaps in a tolerance-friendly framework. (shrink)

In this chapter we explain what the no-difference challenge is, focusing in particular on act consequentialism. We talk about how different theories of causation affect the no-difference challenge; how the challenge shows up in real-world cases including voting, global labour injustice, global poverty, and climate change; and we work through a number of the solutions to the challenge that have been offered, arguing that many fail to actually meet it. We defend and extend one solution that does, and present a (...) further solution of our own. (shrink)