Abstract

A fresh explication of the Thomist justification of self-defense casts off the hobbles of the principle of double effects to find a more secure footing in the historical development of subjective natural rights by medieval jurists, and a straight-forward application to the latent threat of death in childbirth posed by non-consensual pregnancy. By articulating the implicit Thomistic right to defensive abortion in terms of conditional rights bestowed in Creation as correlative to particular natural law duties, justly proportionate limits to defensive abortion are identified, and balanced against the forfeited or reserved natural rights variously imputed to conceptus and embryo in non-consensual pregnancies. Subsequently, the varieties of involuntary consent are examined from a Thomist perspective with a view to their relevance in justifying recourse to a rehabilitated practice of defensive abortion when free and full consent to impregnation and childbirth is absent.