Elon Musk has signed his name alongside more than 100 others to ask the UN to regulate the use of autonomous weapons systems. The group of concerned engineers, many of whom are respected in the field of AI, is asking the global body to "protect civilians" from "misuse" of AI-driven weapons. They believe that smart, self-guided kill bots would become the tool of choice for despots and tyrants. Musk is, by far, the most famous signatory on the letter, but there are plenty of other impressive names, including DeepMind co-founder Mustafa Suleyman. The group believes that smart weapons, that don't need a human to control them, are a step too far in how we wage wars with each other.