Peter was the leader of the original Twelve When Judas killed himself the others appointed Matthius to take his place as one of the Twelve When Peter dies Linus was apponited After thid just look up a list of Catholic Popes and you will have the list up to the present Pope.
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.