You must call a constructor of the base class. Most of the time, that means calling the default constructor and if you leave it out, it will be done for you implicitly. You can specify which constructor to call using the following syntax.
This actually has nothing to do with Unity. You would experience the same behavior if you simply did.
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.