Samuel Fullhart is a fourth-year student in the Department of Philosophy. He’s interested in a range of issues in ethics, metaethics, rationality, and epistemology. His dissertation focuses on issues in ethics and diachronic rationality related to collective action. The central claim of this project is that, with respect to both of these normative domains, there can be a “disharmony” between an individual and a collective level of evaluation. It is sometimes the case that if each of us does what is morally best, we collectively perform a set of actions that is worse than at least one other set of actions we could have performed. Similarly, even if some sequence of actions A is better than an alternative B, and you are able to perform either sequence, it can turn out that at each choice point, you ought to act so as to perform B. The dissertation will explore how these situations can arise in various contexts. One current project draws on empirical research to argue that we can often know, e.g. that our purchases of factory farmed meat won’t make any difference to animal suffering, and considers the implications of this fact for a decision-theoretic approach to individuals’ moral obligations in collective action cases.