You cannot extend a block in Twig. You can overload it if you extend a template (and call parent() which kind of works as inheritance).
If you want to use template from another bundle and you do not want to override whole template you use this.
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.