Published online by Cambridge University Press: 01 January 2020
Is doing nothing sometimes as bad as doing something bad? In this or some less naive form the question I address in this paper is an old one that has been asked not only by philosophers and religious thinkers but also by ordinary people in their more reflective moments. We have recently seen its relevance to such issues as abortion, euthanasia, and the legitimate conduct of war. Active euthanasia is distinguished from passive, aiming to kill from killing as an unintended effect of one's aims, bringing about harm from letting it happen. The Catholic doctrine of the double effect endorses the moral distinction between what one positively does and what one allows to occur.