Why class attribute is remembered?

The problem is that a is not bound. It is a property of the class, not the object. You want to do something like this.

It's an attribute of the class, not the instance, and is created when the class is defined, not when it is instantiated.

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.