If it was WWI, I would've advised you to play Valiant Hearts.
I played te demo and couldn't quite get into it but a colleague told me that she really likes Valiant Hearts. I hope Steam has it on winter sale, I would check it out then.
There is a German movie based on the SPE. I'm usually not that sensitive but I had trouble sleeping afterwards. However, it is a great movie. I'm still shaking my head in disbelief how people can change for the worse.
To continue with my psychology lecture, you only really have to look at Kitty Genovese to see what people tend to do- nothing. She was murdered within sight and hearing of 30 people, begging for help and not one called the police. Bystander apathy is a horrible thing, but more recent studies have shown a lessening trend, thank goodness. Everybody just seems to think someone else will sort it out- so no-one does.
I took a course in self-defence a few years ago and the cops told us that you should always address people directly. For example, if you are sitting in the Underground and someone is molesting you, the best you can do is to talk directly to other passengers:
"You, the man in the yellow jumper. Can't you see that this guy is molesting me? Help me. And you, the woman with the red purse, call the police."
Appearently it is harder to look away once you are called out. However, I think it depends on the situation.