due to a life cut short and prevented from occurring. It is shown that Marquis' criterion may apply to animals as well as humans. In keeping with the intuitions of defenders of mercy-killing, his criterion does not rule out euthanasia and unlike many pro-choice criteria, his criterion makes infanticide wrong. Having established his general criterion of wrongful killing, Marquis concludes that abortion is clearly wrong since it deprives a fetus of a value-filled future, which would be a future similar to our own and a concept that most people can appreciate as being fundamentally important. He cautions that his argument establishes only the prima facie incorrectness of abortion, thereby allowing that there may be overriding circumstances. Marquis again notes that his criterion of wrongful killing will
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