The cypher statement above causes all nodes (besides the root node with ID 0) to be instantiated before deletion in one single transaction. This eats up too much memory when done with 500k nodes.
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.