You don’t have to get too deep into the study of ethics before you run across the trolÂley probÂlem. It comes up so readÂiÂly that it hardÂly needs an introÂducÂtion: a runÂaway train is on course to colÂlide with and kill five peoÂple workÂing on the tracks, but you can pull a lever that will switch it to anothÂer secÂtion of track on which stands only one perÂson. Do you pull it? AccordÂing to a pureÂly utilÂiÂtarÂiÂan interÂpreÂtaÂtion, you should, since one life lost sureÂly beats five lives lost. But faced with the deciÂsion, real indiÂvidÂuÂals tend to strugÂgle: not pulling the lever feels like letÂting five peoÂple die, but pulling it feels like murÂderÂing one.
What if you could stop the train by pushÂing one espeÂcialÂly large indiÂvidÂual off a bridge into the train’s path, stopÂping it but killing him? Few say, or at least admit, that they would do it. But why not? The HarÂry ShearÂer-narÂratÂed aniÂmaÂtion above, a part of BBC Radio 4 and The Open UniÂverÂsiÂty’s series on the hisÂtoÂry of ideas, conÂsidÂers what our responsÂes reveal about how we think ethÂiÂcalÂly.
“What the trolÂley probÂlem examÂines is whether moral deciÂsions are simÂply about outÂcomes, or about the manÂner in which you achieve them,” says ShearÂer. “Lots of peoÂple say they would switch the points, but they wouldÂn’t push the man off the bridge. Are they simÂply inconÂsisÂtent… or are they on to someÂthing?
The TED-Ed video just above, writÂten by eduÂcaÂtor Eleanor Nelsen, gets deepÂer into what they might be on to. “The dilemÂma in its many variÂaÂtions reveals that what we think is right or wrong depends on facÂtors othÂer than a logÂiÂcal weighÂing of the pros and cons,” says Nelsen. “For examÂple, men are more likeÂly than women to say it’s okay to push the man over the bridge. So are peoÂple who watch a comÂeÂdy clip before doing the thought experÂiÂment. And in one virÂtuÂal realÂiÂty study, peoÂple were more willÂing to sacÂriÂfice men than women.” The study of “TrolÂleyÂolÂoÂgy,” a subÂject since PhilipÂpa Foot first articÂuÂlatÂed the probÂlem in 1967, now finds “researchers who study autonomous sysÂtems” colÂlabÂoÂratÂing with philosoÂphers “to address the comÂplex probÂlem of proÂgramÂming ethics into machines.” AlterÂnaÂtiveÂly, of course, they could just put the quesÂtion to the nearÂest two-year-old.
RelatÂed ConÂtent:
48 AniÂmatÂed Videos Explain the HisÂtoÂry of Ideas: From ArisÂtoÂtle to Sartre
Based in Seoul, ColÂin MarÂshall writes and broadÂcasts on cities, lanÂguage, and culÂture. His projects include the book The StateÂless City: a Walk through 21st-CenÂtuÂry Los AngeÂles and the video series The City in CinÂeÂma. FolÂlow him on TwitÂter at @colinmarshall or on FaceÂbook.
