Philosopher Peter Singer has an essay in The Guardian in which he poses a pair of ethical dilemmas, the responses to which are being studied by some Harvard post-docs:
...you are standing by a railroad track when you notice that a trolley, with no one aboard, is heading for a group of five people. They will all be killed if it continues on its current track. The only thing you can do to prevent these five deaths is to throw a switch that will divert the trolley on to a side track, where it will kill only one person. When asked what you should do in these circumstances, most people say you should divert the trolley on to the side track, thus saving a net four lives.
In another dilemma, the trolley is about to kill five people. This time, you are standing on a footbridge above the track. You cannot divert the trolley. You consider jumping off the bridge, in front of the trolley, thus sacrificing yourself to save the people in danger, but you realise you are too light to stop the trolley. Standing next to you is a very large stranger. The only way you can prevent the trolley from killing five people is by pushing this stranger off the bridge into the path of the trolley. He will be killed, but you will save the other five. When asked what you should do in these circumstances, most people say that it would be wrong to push the stranger.
Why do most people think it right to divert the trolley but not to push the stranger in front of the trolley? It's an interesting question and Singer speculates on some possible evolutionary explanations which unfortunately don't sound very persuasive.
More interesting to me is the question of whether we ever have the right to kill an innocent person who is no threat to ourselves, even if it saves more lives. This is a no-brainer for a utilitarian, perhaps, who would doubtless answer that the right act is always the act that produces the greatest net good (i.e. happiness). In these cases the greatest good would be saving the most lives, but for one whose ethics are grounded in the Gospels it's much more complicated and perplexing.
I'd be interested in your thoughts on this.
RLC
