Two Australian ethicists created a firestorm of controversy last year when they argued for after-birth abortions. Another Australian ethicist has taken up their torch, gleefully celebrating the idea of designer humans and in vitro eugenics. A series of recent scientific results suggest that, in the not-too-distant future, it will be possible to create viable human gametes from human stem cells. This paper discusses the potential of this technology to make possible what I call ‘in vitro eugenics’: the deliberate breeding of human beings in vitro by fusing sperm and egg derived from different stem-cell lines to create an embryo and...