Only tangentially related -
I once read a book by a Holocaust survivor where he said (paraphrased) that the really nice ones didn't survive the camps - the ones giving away part of their rations, the ones giving away their blankets to the sick, the ones standing up for their fellows, the ones trying to help the weaker, they were the first ones to be shot, or going into the gas chambers, or dying of hunger or disease. And those willing to be selfish were the ones more likely to survive.
Obviously no judgement or blame either way, in situations like these you'll have to do what's necessary but that point of view hit me really hard at the time "the really nice ones didn't survive the camps".
It made me truly realize the horror those camps represented, they didn't just take their belongings, or their lives, or their dignity - they robbed them of their humanity to the point where being nice to your fellow people would get you killed and that was a horrific aspect that never made it into my consciousness until I read that sentence " the really nice ones didn't survive the camps."