I think CodeIgniter is by far the easiest to dissect. Look into the series on Net. TutsPlus that Jeffery Way did to help lean the basics of this.
If you are trying to research php frameworks in general, then I would recommend to look at Kohana and Silex frameworks. There are two reasons for it: they are both small and with well documented code.
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.