I study political philosophy, applied ethics, and criminal justice policy. I'm author of Protecting Life: The Ethics of Police Deadly Force (Oxford University Press) and Apocalypse without God: Apocalyptic Thought, Ideal Politics, and the Limits of Utopian Hope (Cambridge University Press), as well as co-editor with Eduardo Mendieta of The Ethics of Policing: New Perspectives on Law Enforcement (New York University Press).