For the decision code, take a look at the GKTank example provided by Apple - they take a hash of the device id, send it to the other client, and whichever has the lower number is the "host". That seems like a pretty solid way to decide.
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.