by Tim Sommers

It’s not often that you get a new argument on such a well-canvassed issue, but starting in 2018 Perry Hendricks began energetically defending variations on what he calls the impairment argument against abortion. It attempts to establish the wrongness of abortion without taking a stand on whether the fetus is a person, in much the same way that Judith Jarvis Thomson’s famous violinist example tried to establish the permissibility of abortion even if the fetus is a person. Hendricks’ argument has generated an extensive secondary literature in bioethics and, basically, nothing anywhere else. Here I want to present his argument and my own counterexample, which I will call the Pro-Choice Astronaut.
Hendricks’ original argument can be presented in five steps. If it is immoral to impair the fetus by giving it fetal alcohol syndrome, then, all other things being equal, it is immoral to kill the fetus. It is immoral to impair the fetus by giving it fetal alcohol syndrome; therefore, it is immoral to kill the fetus. To abort a fetus is (in most cases) to kill it. So, all other things being equal, to abort a fetus is (in most cases) immoral. The strength of the argument is that it operates by analogy from a case in which the wrongness is widely accepted even by those who think abortion is permissible.
On the other hand, imagine an astronaut, call her Sally, who is pregnant and who has agreed to a space mission of substantial duration. She knows that the radiation exposure and other stresses of extended spaceflight will severely impair the fetus she carries. She also intends, on return, to terminate the pregnancy. She is not deceived about what the mission will do to the fetus and she knows what she will do upon return. After careful reflection on the facts, her own psychological states, and, perhaps, after consulting with others, she undertakes the mission.
There is no question of irresponsibility here, apart from the question of whether or not the abortion is, in and of itself, irresponsible. Sally is not drinking, taking drugs, or behaving recklessly or thoughtlessly. She is doing her job, which happens to be a job for which she has trained, with which she has been entrusted, and which (we will stipulate in the first variant) carries great social value. The fetal impairment is foreseen and accepted as part of the cost of doing the mission, but the fetus she would otherwise carry to term is not being prepared for a life of impairment. It is being impaired and, then, separately, will be aborted. Read more »





Sughra Raza. Surreal Sunsets, Vermont, May 2026.
A moat is what protects a business from competition. The term comes from Warren Buffett’s image of a castle surrounded by water. The castle is the business; the moat is whatever prevents rivals from storming the walls. A moat might be a famous brand, a patent, a network effect, control over scarce resources, high switching costs for consumers, or a regulatory barrier that makes it difficult for competitors to enter the market. The deeper the moat, the easier it is for a firm to charge high prices, preserve margins, and survive imitation.

Dear Readers and Writers,


Every spring, as reliably as pollen, universities summon the unusually successful to advise the temporarily credentialed.