Derek Leben is Associate Professor of Philosophy at the University of Pittsburgh, Johnstown. He works at the intersection of ethics, cognitive science, and emerging technologies. In his new book, Ethics for Robots, Leben argues for the use of a particular moral framework for designing autonomous systems based on the Contractarianism of John Rawls. He also demonstrates how this framework can be productively applied to autonomous vehicles, medical technologies, and weapons systems. Follow on Twitter: @EthicsForRobots.