Jace can be protective and caring over people he holds dear, such as Clary. He truly does seem to care about her, and they would make a great couple. Clary and Simon would never work out as parents because Clary sees him as a brother; -SPOILER- when Clary and Simon decided to try going out, it didn't work because Simon knew Clary didn't feel the same way he felt for her, so it would never work out.
Because Jace and Clary deeply care about each other, they would make good parents because they would, of course, be protective and loving toward their children. If Simon and Clary were to marry or have children, there would most likely be a divorce sometime in the future. As for the pair of Alec and Magnus, they don't seem interested in starting a family...Magnus doesn't seem "mature" enough because of his incessant parties and et cetera :D Isabelle and Simon shouldn't work out because Isabelle is too..."dark", for him, sorta rowdy.
She is just too fierce for him. Maia and Simon would end up a better couple than him and Izzy, and good parents because Simon has that 'gentleness' about him. He was cautious when Clary got involved with Jace, so it definitely shows he would care about his kids.
Alec and Clary, based on how they treated Max. I think there personality's mix well for parenting. They are strong in different ways and would balance each other out.
Neither of them are as broken as the rest of the characters, and they are both extremely clever. They are both protective and caring about their family's.
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.