You are using a correlated subquery. The subquery is dependent on the outer query, and therefore it has to be executed once for each row of the outer query.
All ways to solve this problem are described in this article.
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.