We consider the consequences for human beings of attempting to create ethical robots, a goal of the new field of AI that has been called Machine Ethics. We argue that the concerns that have been raised are either unfounded, or can be minimized, and that many benefits for human beings can come from this research. In particular, working on machine ethics will force us to clarify what it means to behave ethically and thus advance the study of Ethical Theory. Also, this research will help to ensure ethically acceptable behavior from artificially intelligent agents, permitting a wider range of applications that benefit human beings. Finally, it is possible that this research could lead to the creation of ideal ethical decision-makers who might be able to teach us all how to behave more ethically.