Ben’s research focuses on a wide range of issues in moral and political philosophy: What is the nature and justification of moral rights? What, if anything, makes it legitimate for states to make and enforce laws? What morally justifies punishment? How should self-driving cars be programmed to handle collisions? Should we ever ban human driving if self-driving cars become much safer? An underlying theme of much of his work is that our theorizing about morality should take seriously relevant facts on the ground. For instance, our thinking about rights should take seriously the ways that social practices are necessary to specify what we owe one another, and our theorizing about new technologies, like autonomous vehicles, should take seriously how the technologies actually work.