Bob is close to retirement. He has invested most of his savings in a very rare and valuable old car, a Bugatti, which he has not been able to insure. The Bugatti is his pride and joy. In addition to the pleasure he gets from driving and caring for his car, Bob knows that its rising market value means that he will always be able to sell it and live comfortably after retirement. One day when Bob is out for a drive, he parks the Bugatti near the end of a railway siding and goes for a walk up the track. As he does so, he sees that a runaway train, with no one aboard, is running down the railway track. Looking farther down the track, he sees the small figure of a child very likely to be killed by the runaway train. He can't stop the train and the child is too far away to warn of the danger, but he can throw a switch that will divert the train down the siding where his Bugatti is parked. Then nobody will be killed —but the train will destroy his Bugatti. Thinking of his joy in owning the car and the financial security it represents, Bob decides not to throw the switch. The child is killed. For many years to come, Bob enjoys owning his Bugatti and the financial security it represents (picture courtesy of Eastern Horizon).
Bob's conduct, most of us will immediately respond, was gravely wrong. Unger agrees. But then he reminds us that we, too, have opportunities to save the lives of children.Most of us will respond this way. My students often hem and haw on the matter but when confronted with the actual value of children’s lives versus the value of a Bugatti, they acquiesce and agree that Bob should put the Bugatti in front of the train. We can and should sacrifice for the health of others. I can be happy without a Bugatti.
Now complicate the story a lot. Imagine there were two people who came and talked to Bob. One begins carefully and calmly explaining that there is a train coming well before he can see or even hear it. The train will certainly kill the child but it can be stopped if he goes down the rail and throws some switches that will slow the train down and divert it. There is another man dressed to the nines who shows up and says there is nothing to worry about. The kid will be fine. Everything is fine.