Robots, which are generally understood as systems that take in information about the world, process that information, and can then act on the world, represent an enormous technological and economic opportunity that will change society in innumerable and unpredictable ways. Because they are non-human but can act on the world, new legal frameworks will be needed. Because people may identify with them in ways they would not identify with an inanimate object, they may re-shape families and organizations. Robots change the world of work. Massive changes will bring an array of equally unpredictable challenges and potential crises.