Your friend is wrong. Once you install the expansions they all combine together. So if you have pets and generations installed, you can play both of them at the same time.
You'll be using the pets disk, but you will still be playing generations too. Tell your friend to get her game up! Jk.
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.