A dog's sense of smell can be 20,000 times greater than a human's. Your carpet was probably stored in a warehouse prior to installation where it may have picked up the scents of rats, mice or any other varmint. The carpet installers also have their own set or scents to leave behind.
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.