Most of the world now accepts the idea, first proposed four decades ago, that death means "brain death." But the idea has always been open to criticism because it doesn't square with all of our intuitions about death. In fact, none of the possible definitions of death quite works. Death, perhaps surprisingly, eludes definition, and "brain death" can be accepted only as a refinement of what is in fact a fuzzy concept.
Prusak, Bernard G.
Rethinking "Liberal Eugenics": Reflections and Questions on Habermas on Bioethics [Access article in PDF] Subject Headings:
Habermas, Jürgen. Zukunft der menschlichen Natur.
Agar, Nicholas. Liberal eugenics.
Biotechnology -- Moral and ethical aspects.
Eugenics -- Moral and ethical aspects.
In the new "liberal eugenics," children could be genetically improved as long as the enhancements let children choose from among a wide range of ways to live their lives. The German political philosopher Jürgen Habermas has opened a debate with the proponents of this view. Habermas suggests that a person could not really regard her life as her own if she lived with a body that somebody else had, without asking her opinion, "enhanced" for her.