As I know, fleas use to stay where the Dogs and Cats are. So after cleaning the entire are, let the Dog or Cat stay in a certain area or place and not to move all over in the entire house. And ofcourse clean or wash your pets regularly.
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.