This is the most corrosive effect of liberal neo-eugenics: in positing that an individual ideal of embodiment is something that can be specified, quantified and realised, it creates a framework for torturing both our children and ourselves. Why are we not this perfect thing? Why are we not fitter, happier, more productive? I’m not particularly sentimental about the value of disability in any particular case, but I think it is crucial to acknowledge disability as part of human variation. In treating ever more traits and qualities as things to be measured, ranked and diagnosed, we are doing the opposite – turning variation itself into something like disability.