Aquinas’s Account of Double Effect

Abstract

Double-effect reasoning (DER) is attributed to Aquinas "tout court". Aquinas's account, however, differs from contemporary DER insofar as Thomas considers the ethical status of "risking" an assailant's life while contemporary accounts focus on actions causing harm inevitably. Since one cannot claim to risk the inevitable, and since there is a significant difference between risking harm and causing harm inevitably. Thomas's account does not extend to cases of inevitable harm. Thus, the received understanding of Aquinas's account is flawed and leads to untenable attributions of the direction of intention to Aquinas and to misunderstandings of contemporary DER.