Perry Hendricks’ original impairment argument for the immorality of abortion is based on the impairment principle (TIP): if impairing an organism to some degree is immoral, then ceteris paribus, impairing it to a higher degree is also immoral. Since abortion impairs a fetus to a higher degree than fetal alcohol syndrome (FAS) and giving a fetus FAS is immoral, it follows that abortion is immoral. Critics have argued that the ceteris paribus is not met for FAS and abortion, and so (...) we proposed the Modified Impairment Principle (MIP) to avoid these difficulties. Dustin Crummett has responded, arguing that MIP is open to various counterexamples which show it to be false. He also shows that MIP can generate moral dilemmas. Here, we propose a modification to MIP that resolves the issues Crummett raises. Additionally, Alex Gillham has criticized our appropriation of Don Marquis’ ‘future like ours’ reasoning about the wrongness of impairment. We show that his objections have minimal implications for our argument. (shrink)

Blackshaw and Hendricks recently developed a strengthened version of the impairment argument (SIA) that imports Marquis’ account of the wrongness of abortion. I then argued that if SIA imports Marquis’ account, then it restates Marquis’ position and thus is not very significant. In turn, Blackshaw and Hendricks explained why they take SIA to be importantly different from Marquis’ account. I have two aims in this response. First, I reconstruct Blackshaw and Hendricks’ arguments for the claim that SIA is importantly different (...) from Marquis’ account. Second, I argue that SIA is not importantly different from Marquis’ account in the respect that Blackshaw and Hendricks take it to be. (shrink)

In order for the so-called strengthened impairment argument to succeed, it must posit some reason R that causing fetal alcohol syndrome is immoral, one that also holds in cases of abortion. In formulating SIA, Blackshaw and Hendricks borrow from Don Marquis to claim that the reason R that causing FAS is immoral lies in the fact that it deprives an organism of a future like ours. I argue here that SIA fails to show that it is immoral to cause FAS (...) and abort fetuses that will not be born because it deprives them of an FLO. This is because fetuses that will not be born have no chance of having an FLO in the first place, so causing FAS for and aborting them cannot deprive them of one. I then consider three responses to my argument. I conclude that each fails. SIA does not accomplish its task of showing why it is immoral to impair fetuses that will not be born. Perhaps it can accomplish the task of showing why it is immoral to impair fetuses that will be born, but not without sacrificing at least some of its alleged significance. (shrink)