Certain cases emphatically motivate the view that personal autonomy — autonomy as self-government — is a necessary condition of moral blameworthiness. The cases, that is, suggest that one cannot be morally blameworthy for performing an action unless one is autonomous with respect to that action, or one is autonomous with respect to the motivational underpinnings that figure in the etiology of the action. Here is a typical, fanciful example. Unbeknownst to Bond, a minute electronic device has been implanted in his (...) brain. Maxine can use the device to induce desires or intentions in Bond without her electronic manipulations being ‘felt’ or detected by Bond. Suppose Maxine implants in Bond a powerful desire to kill Oskar, a distant associate of Bond, together with the belief that the desire is irresistible. Though the electronically induced desire is not in fact irresistible, Bond could resist it only with a great deal of difficulty and only at the expense of suffering considerable psychological damage; Bond, to his astonishment, acts on this desire and does away with Oskar. This case is one in which Bond, it appears, is not morally blameworthy for killing Oskar. According to one strand of thought, the judgment that Bond is not blameworthy rests squarely on the view that Bond acts on a desire that is not truly his own;1 Bond is not his own master with respect to the implanted desire that causes him to kill Oskar. (shrink)