Abstract

Many philosophers assume that the principle of double effect (PDE) is meant to cover trolley cases. In fact, trolley cases come from PDE’s critics, not its defenders. When philosophers stretch PDE to explain intuitions about trolley cases, they define intended effects too broadly. More importantly, trolley cases make poor illustrations of PDE because they focus attention away from the agent and onto the victim. When philosophers lose sight of the agent, some intuitions that fit PDE survive, but the rational basis of these intuitions collapses. I avoid these problems by defending a minimalist, agent-based version of PDE. My version is minimalist because I do not try to turn PDE into a complete checklist that explains intuitions about every case. It is agent-based because I consider the agent’s perspective to define intentions and to make moral judgments.