There is a runaway trolley barreling down the railway tracks. Ahead, on the tracks, there are five wolves tied up and unable to move. The trolley is headed straight for them. You are standing some distance off in the train yard, next to a lever. If you pull this lever, the trolley will switch to a different set of tracks. However, you notice that Luna is on the side track. You have two (and only two) options:
- Do nothing, in which case the trolley will kill the five wolves on the main track.
- Pull the lever, diverting the trolley onto the side track where it will kill Luna.
Which is the more ethical option? Or, more simply: What is the right thing to do?