This episode’s guest is John Markoff, Pulitzer Prize-winning science reporter for the New York Times, and author of the new book, “Machines of Loving Grace: The Quest for Common Ground Between Humans and Robots.” He claims that there are two main tracks to robotic development, and our future will depend on which track prevails. In the first track, robots augment human capabilities by doing things that humans can’t, but always under the control and supervision of humans. In the second track, robots, once programmed, can act on their own without further human supervision. He examines the implications of both of these tracks, including the possibility of developing robots that are too powerful to control. Martin Wasserman hosts.