
One of the most famous thought experiments in ethics is "the runaway trolley". It aims to clarify how we should distinguish right from wrong. I have read it before and heard it before, but here is how it is presented on the BBC's website. Read the experiments and then weigh in with your opinion.
Here is the scenario:A runaway trolley car is hurtling down a track. In its path are five people who will definitely be killed unless you, a bystander, flip a switch which will divert it on to another track, where it will kill one person. Should you flip the switch?
Now here's another version of the problem--with a twist:
The runaway trolley car is hurtling down a track where it will kill five people. You are standing on a bridge above the track and, aware of the imminent disaster, you decide to jump on the track to block the trolley car. Although you will die, the five people will be saved. Do you jump?
Now here's yet another version--with (of course) a twist:
Right before your leap, you realise that you are too light to stop the trolley. Next to you, a fat man is standing on the very edge of the bridge. He would certainly block the trolley, although he would undoubtedly die from the impact. A small nudge and he would fall right onto the track below. No one would ever know. Should you push him?