How can I give a graph nodes fixed position in graphviz and how can I make the edges not overlapped?

You can use the attribute pos of a node or edge to specify coordinates. To see where dot places your nodes and edges you can simply run dot myinputfile. Dot without any output parameter.

This will produce the dot file with added coordinates (among other additions). Based on this you can force dot to place some or all nodes at certain coordinates.

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.