I don't believe there's anything built-in for that, because it's a pretty unusual requirement (for example the idea that 1.3358 is closer to 1.33 than to 1.34 is odd). Your code looks reasonably appropriate.
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.