Freewill acknowledges you can do whatever you want, be it good or evil. There is no evil in heaven. Therefore, true free will does not exist in heaven.
Earth is corrupted, heaven is God's home, obviously it would be a holy place without sin. But whether there will be freewill ,i guess we won't know until the day we actually go heaven.
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.