Martin O'Neill is Senior Lecturer in Political Philosophy at the University of York. He works on social justice and inequality, and on various issues at the intersection of political philosophy, political economy, and public policy.

Martin has published in journals such as Philosophy & Public Affairs, Ethics, the Journal of Political Philosophy, and the Journal of Social Philosophy. He is co-editor of Property-Owning Democracy: Rawls and Beyond (Wiley-Blackwell, 2012), and of Taxation and Political Philosophy (OUP, forthcoming).

Jonathan Riley is Professor, Department of Philosophy and Murphy Institute of Political Economy, Tulane University. He is a founding editor of the Sage journal Politics, Philosophy & Economics (PPE), now in its tenth year. He received his doctorate from Oxford in 1983, under the joint supervision of Amartya Sen and John Gray. Riley's research interests are in moral, legal and political philosophy (e.g., theories of justice and rights, varieties of utilitarianism, ethical pluralism and its political implications, democratic theory, etc).

Richard Reeves is a senior fellow at the Brookings Institution in Economic Studies, where he also co-directs the Center on Children and Families. He is also an associate director of CentreForum in London. Before his move to Washington, DC in the summer of 2012, he worked as director of strategy to the UK's Deputy Prime Minister, where he led the Government's work on social mobility. He is a former director of Demos.

Anthony Laden is a Professor of Philosophy at University of Illinois Urbana-Champaign. He works in moral and political philosophy, where his research focuses on the nature of practical reason and reasoning, liberalism, democratic theory, feminism and the politics of identity, and civic education. He also has interests in the history of moral and political philosophy, especially Rousseau, Kant and Hegel.

A. J. Julius is a philosopher and economist who has written about economic growth, income distribution, justice, collective action, reasons, wrongness, and persons.

Joshua Cohen is a political philosopher, who has written on democracy (esp. deliberative democracy and new forms of democratic governance), equality, basic liberties, and global justice. At Stanford, Cohen teaches political science, philosophy, and law. He co-directs the Program on Liberation technologies and has been working on how human-centered design can shape mobile-for-development projects. Cohen is currently on the faculty of Apple University. Since 1991, he has been editor of Boston Review.

Harry Brighouse is a Professor of Philosophy and an Affiliate Professor of Educational Policy Studies at the University of Wisconsin-Madison. He has taught at the University of Wisconsin-Madison since 1992, and spent a brief period of 2000-2002 working at the Institute of Education at the University of London. His main expertise is in political philosophy, and in philosophy as it relates to educational policy and practice, and he has an independent interest in education policy.