[fuyu]

100 years is a long time for humanity to look into ways to counteract time travelling trolleys! Sure it _says_ the future trolley will kill 5 people, but if I were in that situation I'm fairly sure I wouldn't be so certain. In your "political" example: Do you want a guaranteed bad outcome now, or what we expect to be the same bad outcome later?

[YurgenJurgensen]

Maybe we have medical resurrection in 100 years, so killing people might not be so bad. Plus future humans get a perfectly preserved example of a 100 year old trolley out of the deal, which is presumably a valuable antique.