R. Alta Charo, the Warren P. Knowles Professor of Law and Bioethics at the law and medical schools of the University of Wisconsin, considers how the United States and the world—once consumed by fear of our newfound ability to annihilate all life—have now entered an equally stressful era characterized by fear of our ability to create new kinds of life. She spoke at DARPA's "Wait, What? A Future Technology Forum" on Sept. 10, 2015.