In this article, I critically analyze the anthropological foundation of the bioethics of philosopher Jean-François Malherbe, particularly as presented in his book, Pour une Éthique de la Médecine. Malherbe argues that such practices as organ donation and transplants, assisted reproduction, resuscitation, and other uses of biotechnologies in contemporary medicine are unethical because they go against essential human nature. Furthermore, he uses this position as a basis to prescribe public policy and institutional practice. In contrast, I argue not only that ‘human (...) nature’ is much more malleable and adaptive to changes in technology and society than Malherbe allows, but also that his criticisms of medicine and technoscientific development overstep the bounds of the social function of philosophical ethics, which is to inform and clarify public debate. Public policy and institutional practice is thus best left to the democratic political process under the parameters of the just rule of law. (shrink)