Volume 89, Issue 3, Summer 2015
Double Effect
Jean Porter
Pages 479-504
Choice, Causality, and Relation
Aquinas’s Analysis of the Moral Act and the Doctrine of Double Effect
The traditional distinction between the agent’s intention and the effects which she merely permits would seem to allow for a re-description of the act in terms of the agent’s overall good aims. This paper argues that Aquinas understands the relation between the agent’s choice and her overall intention in a different and more persuasive way. His analysis of the object and the end of the act is complicated, but once the relevant distinctions have been sorted out, it is apparent that he does not hold that a particular action can be described, or much less morally evaluated, in terms of the agent’s overall good intentions. On the contrary, he insists that the object of the agent’s immediate choice is always morally relevant, and can be morally decisive for assessing the overall value of the act.