Neither are necessarily immoral. Immoral means having no morals, and having 4 wives and 30 children is not necessarily immoral if you look after them all. The single man with a girlfriend may be moral or immoral.
It depends on his actions with regard to his relationship with her.
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.