Hilary Greaves is Professor of Philosophy at the University of Oxford. Her research interests range broadly across ethics, but with a particular focus around issues of axiology and those lying at the interface with economics. Greaves' theoretical work has spanned, among other things, utilitarian aggregation, population axiology, interpersonal comparisons of well-being, moral uncertainty, discounting, and cluelessness. She also has worked on various issues of practical ethics, including healthcare prioritization, population size, global poverty, climate change, artificial intelligence and existential risk. From 2017 to 2022, Greaves served as Founding Director of the Global Priorities Institute at the University of Oxford.

Jacob Barrett is Assistant Professor of Philosophy and Political Science at Vanderbilt University, and a Senior Research Affiliate at the Global Priorities Institute at the University of Oxford. His research focuses on social, moral, and political philosophy, and especially on questions relating to long-run social reform.

David Thorstad is Assistant Professor of Philosophy at Vanderbilt University, Senior Research Affiliate at the Global Priorities Institute, Oxford, and Research Affiliate at the MINT Lab, ANU. Thorstad's research focuses on bounded rationality, global priorities research, and the ethics of emerging technologies.