All member states have a right to leave. All member states delegate some of their sovereign powers to the Union in order to benefit from the overall advantages. So far, not a single state has left and there is a queue of states trying to join.
From this it would seem that no country has been a net loser through EU membership.
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.