Darwin's theory is that all living things are ruled by natural selection. Natural selection is pretty much the idea of whoever is stronger lives, and the weaker ones die. All of the higher ranking or "better" animals will live on while the rest are left to die off.
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.