 Some prospective parents see life with some disabilities as worse than no life at all. This claim is often made with respect to such conditions as Tay-Sachs, Lesch-Nyan, and trisomies 13 and 18. Even for those conditions, however, that view is not universally held (Wilkinson 2011). The notion of a life so bad that it is a harm to the individual living it came to popular and philosophical attention in the 1980s, when a number of lawsuits in the U.S claimed that physicians or parents had wronged the child by failing to diagnose its condition in utero and/or prevent its birth. These lawsuits appeared to require a comparison of existence and non-existence, which most courts and some philosophers rejected. A majority of philosophers, however, starting with Joel Feinberg (1986), have concluded that the notion can be useful in theory if not necessarily in practice.