I am Professor of Political Philosophy and Public Policy at UCL and Co-Editor of the journal Political Philosophy. I hold a DPhil from Oxford University and an AB from Harvard University. At UCL I am appointed in the Department of Political Science and School of Public Policy, with an affiliate appointment in the Department of Philosophy. I direct the Digital Speech Lab, which produces empirically informed philosophical guidance on how to improve the digital public sphere. I am a UKRI Future Leader Fellow, British Academy Rising Star, BBC/AHRC New Generation Thinker, and recipient of the Berger Memorial Prize from the American Philosophical Association. My work on freedom of expression, social media, democracy, crime and punishment, and counter-extremism has appeared in many outlets including Philosophy & Public Affairs, The Journal of Political Philosophy, Law and Philosophy, British Journal of Political Science, Annual Review of Political Science, The Journal of Practical Ethics, The Journal of Ethics and Social Philosophy, and The Stanford Encyclopedia of Philosophy. I am currently completing a monograph on free speech in the digital age, under contract with Princeton University Press.

I have taught a wide range of courses in political, legal and moral philosophy, with an emphasis on ethics and public policy. I currently teach ethics in an executive training course for civil servants within the UK Treasury, which enables senior policy advisers to reflect analytically on ethical dilemmas they encounter in the course of their work for government. At UCL I have twice won the departmental Prize for Outstanding Faculty Teaching, as well as a UCL Education Award for my educational leadership. At the University of Essex, where I previously taught, I won the Award for Best Lecturer at the University, and the THINK course I created won The Guardian’s University Award for Student Experience.

I am currently a Senior Research Associate at the Oxford Institute for Ethics in AI. I have served as a Faculty Fellow in the Conceptual Foundations of Conflict Project in the School of Philosophy at the University of Southern California, and I have previously been a visiting scholar in the School of Philosophy at the Australian National University.