It has become common, in both popular and scholarly discourse, to appeal to ‘delayed animation’ as an argument for abortion (DAAA). Augustine and Aquinas seemingly held that the rational soul was infused midway in pregnancy, and therefore did not regard early abortion as homicide. The authority of these thinkers is thus cited by some contemporary Christians as a reason to tolerate or, for proportionate reasons, to promote first-trimester abortion and embryo experimentation. The present essay is an exercise in aetiology. It (...) examines the origins of DAAA. Distinctions are drawn between different forms of DAAA in historical context, premises, and conclusions. Some forms raise important anthropological questions, though these arguments are not indefeasible. The most popular forms of DAAA, which are typically framed as appeals to precedent, are the weakest, in that there is little precedent for DAAA before 1950. The argument is in fact a novelty in the tradition. (shrink)

Response to Jan Deckers' critique of the author's earlier article on the beginning of personhood from a Thomistic perspective in which the author revises and further refines his view.

It is often argued that certain metaphysical complications surrounding the phenomenon of monozygotic twinning force us to conclude that, prior to the point at which twinning is no longer possible, the zygote or early embryo cannot be considered an individual human organism. In this essay, I argue, on the contrary, that there are in fact several ways of making sense of monozygotic twinning that uphold the humanity of the original zygote, but also that there is no easy answer to what (...) happens when the human zygote twins. All of the options available carry with them one or more surprising, alarming, or otherwise counterintuitive implications. All things considered, I conclude that the “budding option,” according to which the original human organism present before twinning carries on as one of the resulting embryos but not the other, is the most plausible explanation of what happens when a human zygote twins. (shrink)