Use TraversableOnce. ToMap which is defined if the elements of a Traversable/Iterable are of type Tuple2 . (API).
Alternatively you can use use collection. BreakOut as the implicit CanBuildFrom argument to the map call; this will pick a result builder based on the expected type.
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.