Definitely talk to your brother about this. He should be thanking you for gifts as well, not just his wife. I would still send your niece cards and little things.
It's not her fault that she's being raised by jerks. If you wanted to, you could start her a savings account or put money up for her to give to her at high school graduation instead of spending money for toys now - that way when you give it to her she will be old enough to thank you herself.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.