Ever since the publication of Derek Parfit’s Reasons and Persons, bioethicists have tended to distinguish between two different ways in which reproductive technologies may have implications for the...

In Enhancing Evolution: The Ethical Case for Making Better People (2007), John Harris argues that a proper concern for the welfare of future human beings implies that we are morally obligated to pursue enhancements. Similarly, in “Procreative Beneficience: Why We Should Select The Best Children” (2001) and in a number of subsequent publications, Julian Savulescu has suggested that we are morally obligated to use genetic (and other) technologies to produce the best children possible. In this paper I argue that if (...) we do have such obligations then their implications are much more radical than either Harris or Savulescu admit. There is an uneasy tension in the work of these authors, between their consequentialism and their (apparent) libertarianism when it comes to the rights of individuals to use—or not use—enhancement technologies as they see fit. Only through a very particular and not especially plausible negotiation of the tension between their moral theory and their policy prescriptions can Harris and Savulescu obscure the fact that their philosophies have implications that most people would find profoundly unattractive. (shrink)

we always get to this difficult conversation one way or another when I'm talking to friends who have kids with disabilities. It goes like this: "If there had been a test for autism when my wife was pregnant with our son," my close friend tells me, "she would definitely have had an abortion." He tells me this with candor because he knows I know that this does not mean that he regrets having the son, grown up now, that they do (...) have. Parents with disabled children are usually rightfully wary about engaging in such conversations, but perhaps because I have a significant congenital genetic disability myself, we talk together about this with intimacy and mutual understanding. With his reflection about what we now... (shrink)

The idea that a world in which everyone was born “perfect” would be a world in which something valuable was missing often comes up in debates about the ethics of technologies of prenatal testing and preimplantation genetic diagnosis . This thought plays an important role in the “disability critique” of prenatal testing. However, the idea that human genetic variation is an important good with significant benefits for society at large is also embraced by a wide range of figures writing in (...) the bioethics literature, including some who are notoriously hostile to the idea that we should not select against disability. By developing a number of thought experiments wherein we are to contemplate increasing genetic diversity from a lower baseline in order to secure this value, I argue that this powerful intuition is more problematic than is generally recognized, especially where the price of diversity is the well-being of particular individuals. (shrink)

Despite the advent of CRISPR, safe and effective gene editing for human enhancement remains well beyond our current technological capabilities. For the discussion about enhancing human beings to be worth having, then, we must assume that gene-editing technology will improve rapidly. However, rapid progress in the development and application of any technology comes at a price: obsolescence. If the genetic enhancements we can provide children get better and better each year, then the enhancements granted to children born in any given (...) year will rapidly go out of date. Sooner or later, every modified child will find him- or herself to be “yesterday’s child.” The impacts of such obsolescence on our individual, social, and philosophical self-understanding constitute an underexplored set of considerations relevant to the ethics of genome editing. (shrink)