Killer robots that can attack targets without any human input should not have the power of life and death over human beings," a new draft U.N. report says. The report for the U.N. Human Rights Commission ... deals with legal and philosophical issues involved in giving robots lethal powers over humans. Report author Christof Heyns, a South African professor of human rights law, calls for a worldwide moratorium on the "testing, production, assembly, transfer, acquisition, deployment and use" of killer robots until an international conference can develop rules for their use. The United States, Britain, Israel, South Korea and Japan have developed various types of fully or semi-autonomous weapons. Heyns focuses on a new generation of weapons that choose their targets and execute them. He calls them "lethal autonomous robotics," or LARs for short, and says: "Decisions over life and death in armed conflict may require compassion and intuition. Humans - while they are fallible - at least might possess these qualities, whereas robots definitely do not." The report goes beyond the recent debate over drone killings. Drones do have human oversight. The killer robots are programmed to make autonomous decisions on the spot without orders from humans. "Lethal autonomous robotics (LARs) ... would add a new dimension to this distancing [i.e., the remote control of drones], in that targeting decisions could be taken by the robots themselves. In addition to being physically removed from the kinetic action, humans would also become more detached from decisions to kill - and their execution," he wrote.