The problem, just as a reminder, is that there is an oncoming trolley, and a fork in the tracks, with 4 people tied to one of the tracks, and 1 person on the other track. Do you pull the lever to divert the trolley to the track with the one person to save the 4 others?

You should of course not divert the trolley.
The 4 people have 4 times the probability to have the next Hitler among them, therefore you should let them die, to be more likely to prevent the next Holocaust.