Double-Effect Reasoning: From Jean Pierre Gury to Peter Knauer
The author argues in favor of the thesis proposed by Peter Knauer and others that double-effect reasoning, or the principle of double effect, changes in character from Aquinas's initial formulation in his treatment of self-defense to the articulations offered by various manualists. However, Knauer and others fail to recognize that proportionalism is better understood as an extension of neo-Scholastic Jesuit manuals than as a recovery of Aquinas.
Kaczor, Christopher. “Double-Effect Reasoning from Jean Pierre Gury to Peter Knauer.” Theological Studies, vol. 59, no. 2, May 1998, pp. 297–316. https://doi.org/10.1177/004056399805900206.