The 3 factors that affect depth of field are the focal length of the lens, the camera (lens) to subject distance and the aperture (f-stop) selection. The term used to describe the quality of the blur is called Bokeh.
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.