If there are no animals then no the fleas don't live in the carpet all year. What do you think they would live on since they suck blood? If you have indoor cats then they will live on your cats.
Treat the cats with Advantage, Frontline or Revolution and things should be fine.
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.