I had read about the “trolley problem” in the past, but not given it much thought until recently when I saw Thomas Cathcart’s little book of that name in the philosophy section of an Indigo bookstore. It’s subtitled, “Would You Throw the Fat Guy Off the bridge? A Philosophical Conundrum.”
I, of course, was so intrigued I had to buy it. I have read others of Cathcart’s books and liked his work in introducing/popularizing philosophical concepts.
The original trolley problem is a thought experiment that goes like this, as Wikipedia puts it:
There is a runaway trolley barrelling down the railway tracks. Ahead, on the tracks, there are five people 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 there is one person on the side track. You do not have the ability to operate the lever in a way that would cause the trolley to derail without loss of life (for example, holding the lever in an intermediate position so that the trolley goes between the two sets of tracks, or pulling the lever after the front wheels pass the switch, but before the rear wheels do). You have two options: (1) Do nothing, and the trolley kills the five people on the main track. (2) Pull the lever, diverting the trolley onto the side track where it will kill one person. Which is the correct choice?